A lot of times when I see bands play live, many of the bassists play with a pick. It seems to me like more people are trying out pick playing. You always hear people that are only finger players say that pick players aren't real bassists, but playing with a pick provides that certain sound that only the pick can deliver. Being able to play with a pick and fingers will give you a lot more options with your sound. I think people shouldn't bash so much on pick playing. I've grown to like that harsh growly sound you can only get with a pick.
Assuming you are not playing a bass convention, very few, if any, of the people in the audience will notice a pick. They will notice (if only subconsciously) if the bass sounds great.