My favorite part of Paizo's Ultimate Campaign has been the Background Generator rules. I initially had an Excel spreadsheet to automate the process, but I thought I would share the love and d20pfsrd was nice enough to host my app.
Now go forth and give your PC a rich history...
As if my profile didn't give it away!
I bought the Pathfinder Beginner Box for my daughters and they loved it. Hopefully, by creating a free reference website (following in the footsteps of d20srd.org and d20pfsrd.com), I can help promote the Pathfinder game we all love to new gamers young...
Given that I run a "simple" game for my daughters and play in a high-level "complex" game with my friends, I appreciated 5E's approach of creating a la carte mechanics that will let me use just the pieces I want for a given game.
+1 to the other comments about "gap filling".
Pathfinder sorcerers have very interesting bloodlines to select from making each one distinctly different. Check it out.