I'm 1,80, apparently for FtM's I'm a giant or something, lol!
But yeah, I'm pretty happy with my length, I'm not super tall or big, nor extremely petite and finely build. Lots of guys are bigger, but plenty are also smaller, so... yeah...
But I don't think it matters that much when it comes to passing, yeah. I know a guy in my class who's 1,50! And he never gets mistaken for a girl, (because the shape of his body, I think, which completely a-feminine)