So my personal ranking so far, and trust me I know my thoughts are not the popular opinion but they're my own, to rank the 8 episodes aired so far, I would rank them:
8 > 2 > 6 > 3 > 7 > 5 > 1 > 4
So to go through my reasoning a bit,
Part 8 I absolutely adored the imagery, the unspoken narrative going on, the atmosphere, and it was littered with scenes I can already tell are going to stick with me. It had terrifying and beautiful moments in it. I think this episode produced the strangest, some of the most terrifying, and some of the most beautiful stuff in the series. I also felt Lynch managed to make one of the most terrifying 1950s-styled films towards the end of the episode, and before then the beauty of the Purple Ocean/White Lodge place stood out and the scenes that followed. The nuclear explosion was oddly beautiful and then terrifying... I liked it a lot, it was an episode which meshed well and delivered strong emotions of different sorts.
Part 2 I loved the scenes in the Black Lodge, I loved Coop's space trip, I loved the aftermath of Shaggy (cough) going to prison and his wife, and building up Mr. C as a very intimidating villain. There was a lot of great introductions and developments this episode. It's hard to put directly into words for me, but I adored the pacing of this episode, I loved the pay-off with the jail stuff and the first creepy look at the Woodsman, and the main plot of the episode following Cooper in the Lodge and Mr. C dealing with stuff in the real world, both sides were utterly engaging. Number of stand-out scenes for me. We also get introduced to the Evolved Arm and his doppelganger, which I love. Also can't forget that beautiful first Roadhouse outro with the always cool James.
Part 6 I think is maybe the most underrated episode of the show right now. I loved the scenes with the trailer park owner and the scene of the kid getting ran over had a profound effect on me and actually made me cry. The scene with the guy and the dime was utterly fascinating, tense, and strange. I actually really liked the Dougie scenes in this episode of him just drawing and presenting it to his boss, it entranced me. Janey-E's scenes in this episode won me over on the character, the introduction to Diane was great, and the Ike Spike murder spree was great. I even liked the wife scenes and seeing the cops a bit more, Hawk finding the restroom door pages, and the dialogue between them. I don't understand why so many are so down on this episode.
Part 3 so many people dislike, but I liked it a lot! I love the beginning Purple Ocean (White Lodge?) scene with Mother, space, Blue rose, etc. I love the Mr. C and Dougie stuff in this episode. I love Jade as a character and the scene of them leaving the Ranch. The Casino stuff went from being intriguing to sad to funny to tedious to funny again for me. I can understand the dislike, but I was enthralled. Many view the episode as the most strung out, but I found myself captivated from beginning to end. It probably helps I loved the purple ocean stuff, I loved Jade's character, I loved watching Dougie in the casino, and loved all the in-between stuff too.
Part 7 is the closest this show has gotten to classic Twin Peaks, a lot of exposition, quirky character moments, and a surprisingly fast pace in moving the plot forward. From getting to know Diane, who is a great character in my opinion, to getting more of the the police force, Hawk's speculation, Frank Truman's special desk monitor, and then the Cooper karate scene, the creepy scene with the Woodsman, the military scenes with Major Briggs, the funny opening with Jerry being high, the scenes with Ben Horne either being a gentleman or a creep, a good amount of Cole and Albert to enjoy, Andy being either a good or bad cop, and of course peanut sweeping. It's quirky, narrative-full, and sometimes very funny, other times emotional, and other times tense. I also admit it was somewhat cathartic to get answers to long standing questions from the season 2 finale.
Part 5 had its stand-out moments for me, I actually loved seeing Dougie go to work for one. But more so I loved a lot of the character stuff we saw, from Becky being drugged out, to Richard being a creepy-ass rapist, to the marvelous reveal of what the golden shovels was for and Dr. Jaco---Er, I mean "Amp's" livestreamed program. loved the scene with the mob in Vegas with the weird dancer girls and pummeling the guy, loved the kid with the bomb in the car and the car thieves trying to snatch it up. Of course can't forget the Brigg's stuff and the tape recorder related to Jefferies. I felt out of all the episodes this one felt the most disjointed with a lot of scenes from different parts playing, but it helped the tone and pacing of this particular episode.
Part 1 is the introduction and build-up, and they introduce a lot of things. the two main plots of this episode are the guy watching the box and Shaggy (cough) being suspected of murder while cops investigate an apartment and then a home. It took me a bit to get into it, but Shaggy (cough) gives off a terrific performance and the scenes work in an appropriately off-kilter sort of way. Also the thing in the box ends up being terrifying.
Part 4 has actually ended up being my least favorite, but I will like it a lot. I love the later stuff with Cole and Albert checking in on Mr. C in prison, that stuff is chilling, and it's very fun to see Cole and Albert interact. It's also fun seeing David's character again as head of the FBI, and seeing Bobby is a cop now and the beautiful return of Laura's theme as he see's her picture. And I don't hate the rest, but I dfo feel it has some of the weakest stuff of the series so far. Wally is fine, funny and long-winded. Dougie meeting his son, getting read for work, coffee is fun. Seeing Andy, Lucy, etc., again is fun. None of it is bad for me, but I just felt this episode was the weakest of the batch but still very good, a lot to like about it.
But this is all just my opinion. I've loved the whole series so far and every episode so far, though.