When I first started playing bass, I was emulating the Bruce Foxton - Jam sound as he was my hero at 17 years old, so I used a pick from day one.
However, these days mainly play fingerstyle, but can still use a pick when the need arises.
On the original version of "The Chain" by Fleetwood Mac, John Mc Vie uses a pick on the bass on the famous F1 bit, but plays fingerstyle on everything else.
If you ever get the chance to hear the live version, he plays it fingerstyle and TBH it sounds terrible It just doesnt cut through like the album version.