Regarding ITYSL:
Season 1 is my favorite, but I only liked a few sketches the first time through. A few more the second time, etc. Pretty much all of the sketches are great.
Season 2 was half home runs and half striking out, if you ask me.
Season 3 is a lot of singles and doubles. I watched it the first time through with a lot of ITYSL fanatics though, and we had a blast. My wife enjoys the show but isn't a huge fan, and season 3 is her favorite. That may be telling.