Shiner- Still kills me.
Failure- Ken Andrews just stop. No more On, no more Year of the Rabbit. Failure, that's the band you're making cheap imitations of, that's the band that you need to get back together.
Refused- Loved them as a hardcore band, loved them as an experimental punk band, hate them as International Noise Conspiracy. (I know different people, but ...)
Jawbox- Except that it yielded Burning Airlines, which also broke up, yielding Channels. Essentially J. Robbins keeps putting out more and more watered-down versions of Jawbox. Fortunately, his watered-down stuff is better than most people's A-game.
Quicksand- Rival Schools and Orange 9mm didn't compare.
Hum- I played a show once with Matt Talbott's other band, Centaur. It was good, but again, no Hum.
Houston- Head Like a Roadmap was genius. AMAZING live.
The Get Up Kids- I saw them when they were in between Four Minute Mile and Something to Write Home About. Four Minute Mile is still one of my favorite albums, sloppy, whiny emo or not...
...which brings me to-
Sunny Day Real Estate- Although, they probably should have packed it in after How It Feels to be Something On
Mineral- Also whiny, but i loved it. i don't have a single friend who will let me play "End Serenading" in my own car without a massive protest.
Karate- The best of the indie-jazz-rock thing, in my humble opinion.
There are more, but I can't think of them right now.