I started off on guitar, so the pick feels pretty natural to me. But I've also spent a lot of time perfecting my right hand fingering technique so that feels pretty natural as well. It really just comes down to application. If I'm just generally messing around, then I'll probably use my fingers. It used to be that technique kept me from playing faster lines kept me from using my fingers because I couldn't play straight sixteenths very quickly, very evenly, for very long. But now I've practised long and hard for that ability and can keep up, but if I'm going to be playing fast punk or something similar, then I'm going to want to use a pick, because it just fits the sound better.
It's just all about what sound you need out of your toolbox to fit the part.