Absolutely stand.

Sitting has a number of problems, for me it’s mainly dick touching the toilet seat and it’s impossible to pee all the way with the dick curved inside the bowl. And, if it’s a public toilet, it’s simply nasty.

It is completely possible to avoid splashing and noises and spreading pee around while peeing standing. Just aim slightly away from water, and if your aim is bad, clean whatever mess you could make.

Also, urinals are superior pissing devices and should be used when possible.