^ That's all a matter of perception though...
Remember, we all have our tastes, different characteristics of music stimulate us individually. Derek may dig more obscure stuff later down the line, when his mind is heading into that direction. Right now, he's in his own direction, and that's cool. All depends, really, on what we each seek from music as an entity. Some of us seek technicality, others, catchiness, others again, seek atmosphere, and so on.
At Alter: It doesn't bother me if I don't get into the more obscure bands that are very inaccesible, I seem to still be getting into new bands on a regular basis and there's always Metal out there I like. If I do in fact get tired of the constant Extreme Metal assault I've been listening to for the past 2 years I can always go take a break from it and listen to Old School West Coast Rap, Hardcore Rap(old 36 Mafia, Project Pat, etc..) and varying degrees of Electronica. I don't see it happening soon but much like how Kristofer Rygg became burnt out on Metal it could possibly happen to me as well.
I say balance things, especially when you like varying styles of music like you do. They each get a part of your mind, your personality working, so I say balance it.
For example, tonight whilst at work I've been through some Baroque, then Doom, some Indie, Post Rock, Black Metal, and now I'm hammering out some Detriot techno. Fuck sticking to one style, I say, lap it all up. Take pieces of each thing you like, and enjoy it to your hearts content.