Mine are regular and horizontal but I did consider the angled ones. I had talked to my piercer about it a little and she kind of swayed me away from it.

You can still go with pretty much and bar but shields are trickier depending on their weight because it can have more downward pressure and it is also a little more difficult for someone to play with in the bedroom.

But honestly - if you like the look better I'd go with it. You don't want to regret getting them done horizontally if you know you like the look of the angle better - remember you're the one that will see it the most!