I don't use urinals anymore. I used to but sometimes it was hard to start the stream because I'd wait too long. Then having two or three different people go next to you on each side, with an increasingly annoyed crowd behind you, is not a good feeling. I still use them if I really have to pee and no stalls are available.
The real reason I use the stalls almost exclusively now is due to OCD. I stay for a long time to make sure all urine is completely drained out, I also use a wad of toilet paper before I shake so as to avoid getting any drops on my hand (can't do that at a urinal). I also shake excessively and people would probably think I was playing with myself. I wasn't always like that, but OCD gets progressively worse with age. Though I make improvements here and there.
Even when there is a single bathroom with a toilet and urinal in a locked room, I still use the toilet, because you can aim it to hit in a toilet so it won't really splatter. It's harder to pull that off at a urinal even when you stand back really far. That could be part of the problem with me at the urinal too. I stand back a little further than most so I won't get hit by any splatter, and I feel like I'm on display more, or people will think I'm trying to illicit glances.
Ironically, I hate using stalls though. It feels so unmanly. I always wonder if guys think I must have a small dick (not that that is something to be looked down upon for anyway) and that's why I'm using the stall. I'm not huge, but I'm certainly not small. I just assume the other men are looking down at me when they hear me pissing in a stall (also wondering why I'm tearing off toilet paper for a pee). It's really embarrassing, but I'm pretty used to it and it seems to be the lesser of two evils for me.