AC1 is the best, apart from having to watch a ton of boring cutscenes everytime you boot into the game. The climbing was the best, and the missions are actually challenging (as far as I can remember). 2 was also good. I liked 3 for the most part. Controversially I didn't like black flag that much, but it was probably series burnout.
AC1 had actual challenging assassination missions, where you had to scout out your target and their movements. It also had tougher combat from what I remember. The psp spinoff Bloodlines (which probably no one here played) was also really good for a psp AC Game. It also started off with a cool premise for the animus and the astergo parts with Desmond were good story wise.
AC2 though is my all time fav. It was such a large game and Ezio had character, desmond they fleshed out too. He was relatable. The game itself always felt like you were progressing somewhere. Between the different locations and building your village/castle in Montigerno.
Haven't played brotherhood or revelations yet. I own them on steam and switch. Working on replaying ac2 on switch now.
AC 4 was fun but not a ac game. I hated the Abstergo current time crap. After they got rid of Desmond that had to go.
Now all current time/abstergo sections are just some lesbian no personality zoomer and her handler for a few minutes.. basically blocking you from the main game. They are there just to be there. Its been the same bland no name zoomer for the last 4+ games, ever since syndicate or unity i think. Black flag just had generic corporation and skipped most of real world stuff.
At least Desmond had some personality and Niles was an asshole you loved to hate.
Best protagonist was Ezio, followed by Altier(ac1) and Bayek(ac origins). The others were lacking in unique personality, The unity guy, Arlo (i don't even remember his name) was like carbon copy of Ezio in both looks and personality.
The worst character was the Aya, who betrays Bayek over vengenance and power, that she really doesn't even portray right. You never feel any emotion from her for Bayek or her son. I personally couldn't stand her.
Vahalla had the blandest characters. The female version (and most women in that game) look like skinny dudes. It really takes me out of it. Woke take over of ubisoft complete. Her voice is manly, her face is manly and her body is manly. They didn't have this problem before twitter people blasted them. sucsk as this era could of had some really jaw dropping, kick ass babes, but not what we get .