Well, here's my thing:
I think it is nice to have both blazing speed and the ability to play something melodic and catchy. But most of all I like to capture what I'm feeling, and I find that something slowish usually does the trick. It's easier to be more expressive by bending a note just so than by slinging notes as fast as my fingers will allow. The biggest influence on my playing is probably Les Claypool, but as much as I love Primus and all of his other projects, their's something about the way that Mark Sandman played on a two string bass with a slide that will latch onto my mood and drag it all over the emotional gambit. It's not what's complex or simple to me, it's what fits. And you know, both can fit anyway depending on the circumstances.