Any band that plays a short lick over the rythm and calls it a solo is lame (basically, most rock bands since 1993). There are too many for me to mention but "With Arms Wide Open" from Creed will be my best example. I remember reading Tremonti on solos... "I want things as thick as possible, and taking solos sometimes thins things out" (this isn't verbatim but I'm quoting that from the November 1999 Guitar-World magazine). To me that sounds like a subtle way of saying "I am not good enough to play them." Solo playing is one of those things where its really best to learn it from somebody who knows what they're doing, and most of the guitarists who play lame solos tend to be self-taught from what I've observed (Mark Tremonti once again is my best example)

As far as the best solo, I vote for Pantera's "Psycho Holiday". Or maybe James Labrie's "Crucify".