There's nothing at all wrong with using a pick, and there are some amazing players around who play predominantly or exclusively with a pick and make a great noise!

) Carol Kaye, Steve Swallow, and Michael's band mate in SadHappy, Paul Hinklin would be three that immediately came to mind, as well as scores of rock and metal bassists. Oh, and not forgetting the great Anthony Jackson!
So no pick snobbery here - I've just started investigating them again recently, particularly because I was given a load of F1 picks (
www.f1pick.com ) at the NAMM show to try out and I really like the design. It something I intend to do more of in the future... I also work in a duo with a cellist who's started using a pick for some melody lines, which is a great sound!!
You may find that there are certain things that you want to do that require you to play with your fingers, though there are various fingerpicking techniques that allow you to use a pick and also use the other two fingers... The key is to experiment, and see what works, and when a sound comes to mind, develop a technique to match it. There's something to be said for working on technical ideas and seeing what music comes out of them, but I find that the other way round is a more organic way of writing and improvising...
Good Luck and if you get anything recorded on MP3, let us know!
Steve
www.steve-lawson.co.uk