If just into BB'ing, or generally getting stronger, than might suggest a trap/shrug bar/hex bar (whichever name you want to use). Advantages are that the thumbs are facing forward (a more natural grip), bar not touching/rubbing against the body and the body finds it easier to stay more inline with the ankles/hips. A straighter up & down position, which may reduce the chance of injury's to the lower back...less stress, can be achieved.. Trap bars are also great for exercises like farmer walks and step-ups.
Disadvantage...the width of the grip stays the same, can't try a narrower or wider grip. Though a few guys (me included) grip the 45's for a wider grip, great for building gripping power.
Good luck.