Too many to mention. I'm a big South Park fan, I've watched every episode.
I disagree with the 1st seasons being the best. I think the show got really good between about the 4th or 5th season and season 12 or so.
The last couple of seasons have been f*cking terrible tho. The show has really fallen off, lets see if it can get back up.
The show itself has been hilarious with a lot of classics till about season 14 more or less.
This was funny as f*ck to me the 1st time I saw it. Kinda racist, but hilarious!
Butter's Bottom B!tch is one of my favorite episodes
Elementary School Musical was hilarious too
Asspen
The Lord Of The Rings episode
D Yikes
Go God Go
Breast Cancer Show Ever
Tonsil Trouble (The one where Cartman gets aids)
Too many to mention. This guy was funny as f*ck.
Also, to me, Butters is the best character in the whole show and he didn't get introduced till the 3rd or 4th season.