I played almost exclusively with a pick most of my bass-playing life, because I found it easier, and it gave me a better sound for the music I was playing at the time (thrash metal/punk-type stuff). I was never fast enough with my fingers for that stuff (we can't all be Steve Harris). Now that I'm getting back into playing, and the material is a little more middle-of-the-road, I've been forcing myself to relearn finger style, just because I don't like the pick sound in most situations. I still use the pick once in a while, but now it's about 80/20 finger over pick. It's a struggle, but it's worth it to be able to do both.