I was torn on the same choice before I choose my white BRZ. I had owned 3 black cars before. The reasons I chose Pearl White (In order of Importance):
1. More color contrast with white against features of the car. (Black headlights, Side Fender, Tinted Windows, Rims, even the Antenna if you don't add a shark fin) All those things contrast against the white paint and really adds attention to the overall detail of the car.
2. Black hides the sexy shape of the car. No point in having a great looking car if you can't see the lines of it.
3. It's not just "white". The Pearl White looks way better than any other plain white car you'll see or park next to! There's plenty of black cars out there. You don't see a whole lot of Pearl White out there. People do notice the difference, and so will you.
4. Black gets dirty fast
5. Gotta keep tires clean otherwise the tired and paint don't go well together
6. Black gets very hot in Texas
7. There's a reason that Whiteout on FRS costs extra. The Pearl White color is a premium color! Black is just plain old black!
This is just my opinion. Hope it helps.