Objectively, Jacob is a good name. I see why it caught on in popularity - and not a whole lot of names end in B, so it doesn't really "blend in" and fade. That said, I have known so many Jacobs (and Jakes) that I would feel weird using it myself.
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Please rate my personal name lists:
www.behindthename.com/pnl/69381www.behindthename.com/pnl/69381/117507www.behindthename.com/pnl/69381/109399hwww.behindthename.com/pnl/69381/132018http://greens-end.myminicity.com/env