In San Diego I don't recall seeing any E82's other than one 128i in Ralph's but the E92 is damn popular, 328i's all over and a few 335i's also. Pattern with those seems to be all mid-20's and mid-30's guys, usually a mid-20's guy driving a modded 335i.
I think the 1-Series is regarded as more of a girly/tame car, I think that's unfair though but it's true if you look at the drivers. Here in the UK it's hot girls or 'older' (
) people driving the E82 (118i, 120i, 120d) and our hatchback versions (E81) have a reputation of being loan or company cars and are almost always a 120d. The 135i over here is VERY rare, there aren't many on the road at all and no-one know what one is, I've seen one other apart from mine on the road since they were first released in 2008 and that was a young guy who had modded it. I do sometimes miss the prestige of my 335i, the size of it better repuation but then all I have to do is hop in my 135i and drive and I don't think about it again (goes faster, handles better, stops better).
I'm 25 by the way.