The first season of just about any TV show makes me cringe, SGA included. It's not that it didn't have great moments and great episodes, because it did. But to me the cast interaction feels stilted and the characters haven't gelled yet. Even my favorite first season SGA eps (with a few exceptions, like The Defiant One and The Storm/Eye) just don't feel quite right to me.

So I had to go with Season 3, which has 4 or 5 of my favorite episodes ever, plus the easy, practiced timing among the cast.