To be honest, clean and sober Barney has never struck a chord with me. The only good thing to ever come from a sober Barney was Moe's "coffee" stall and the smoke machine choking him. Although I suppose it did bring around Homer's fail when he's trying the gymnastics. I'm not saying I dislike the episode, it's definitely one of the better episodes all round, I'm just saying I find things funnier once he's part of the program and in space. Kent Brockman's overreaction to the ants is hilarious.
ETA: Is Deep Space Homer the one where Homer calls for Marge for advice, then halfway through her speech he starts dialling again?
Yes, it is. Don't you feel ashamed now? Also, I don't think you and Sousa are entirely referencing the same "clean and sober Barney." In "Deep Space Homer", Barney is just temporarily so, while you seem to be referencing his later seasons-long run of sobriety.
And Sousa? You compared Lanley to Hank Hill. I suppose a comparison can be made, but something (everything) tells me you meant Harold Hill.
As for the list itself, I can't say I'm shocked that all but maybe 2 of my picks were left off of the list. I voted late in the game, so I intentionally went largely with dark horse selections (seriously, if people aren't watching the newer seasons, they should be. Not "prime of the show" good, but still very good.) Plus, with so damn many shows being voted for overall, we had some episodes make the top 25 on the strength of two votes.
No big complaints, though. In the end, even my personal top 25 will always be changing, and this list is a decent cross-section of the series.