I saw them in 1998 on the 9 Lives tour and in 2001 for the Just Push Play tour - both shows were in the basketball stadium on my college campus at Illinois. I've had no desire to see them since - I have great memories of those shows and haven't really wanted to sour the experience 20 years later. I'm happy to have seen them when they were younger and age or health wasn't as much of a factor in the performances.
Funnily enough, my favorite release is A Little South of Sanity, the live album from the 9 Lives/Get a Grip tours....it just brings me back to those shows when I was in college. They've always been a killer live band.