I always thought their music was just so appealing.... almost like a breath of fresh air. They had the rock influence. They had the ska influence. They had the MC and the straight up rock singer. That is why I still think it's fresh. Same as Sublime. Was there even a band that just AGED so well as Sublime? It's a mixture of everything that is good about rock n' roll. You see so many bands go hard for one type of sound because they don't want to pigeon holed or ripped apart by fans or critcs for "god knows what." It's like my friend said about the Cars once..... "Man. Don't you just like feeling GOOD sometimes." That's what 311 is. They may you feel good by wearing their influences on their sleeves. It's just so much fun.
Their positivity is def one of their best traits. I can understand why some bands mellow out over time. Yup, the mix of styles just makes them all around fun to listen to.
And as a drummer myself, I put Chad Sexton up there with the best of them.