duff city is the best meme that he uses
just the phrase 'duff city' is hilarious to my brain for some reason
also the attachment of 'STUPID!' to stuff at. 'welcome to duff city, STUPID!" on ch fierces from dudley and balrog always make me crack up
lee chung does good commentary, he can be insightful about the game and patterns for folks he knows while also being a good energy/hype guy
i think sf has it's fair share of good commentators just by virtue of it being the biggest game. at every single major there's always at least one dude who is like a good combination of insightful (for local players at the very least), funny and energetic.
marvel is much worse in terms of acceptable commentators- a lot of folks try to be the hype guy because of yipes/ski/chris matrix/whoever else but fail because they aren't really charismatic in the same way. insightful commentary to the game is harder because it's much more free-flowing and getting a handle on the situation can be rough on folks who don't have extensive experience with the game or 'marvel' style games, which is more likely with a 2 year old game rather than a 5-6 year old game.
the game however does have a bit of a flow where there's downtime during combos to somewhat explain what happened which is what good commentators do. or just have fun chatting with the other guy, which is great for marvel because there's a lot of extremely dry, repetitive combos like lightning loops and fof loops that leave a lot of downtime that don't have much explanation required for the situation beforehand that put the other player into the combo.
ultimately everyone has different tastes for commentary and there is some level of standard but a lot of folks fulfill it on the SF side for sure, lee chung included. i personally love asshole, biased commentators but i know a lot of folks hate 'biased' commentary- it's absolutely hilarious. identifying what you like about someone's commentary is important and a really obvious part of being critical that folks seem to miss.
edit: get duffed is also good but not on the same level