During the day, while I'm out (and there are urinals) at work, I'm a stander. Aim isn't such an issue with those.
At home, I'm a sitter. WHen the stream... uh.. starts, it does a immediate left turn upon exit. Then it straightens out. THis makes it damn tricky to get it all in the bowl. A little splash is ok, but it's always more than a little splash.