Gaah - not me. I love pants because they cover up my horrid legs. And my flat bum.
As for guys who always wear pants, I've always found that weird! Where I live, it's around 4 degrees celsius (COLD) in Winter and I see men in shorts and t-shirts all the time. I asked a guy at a bus stop about it once. His response was "I just don't get that cold." Fair enough!
I guess I don't really mind/not mind either way, except if they're sitting really close to me in a small space like on a plane - I once sat next to a guy in shorts on a 9 hour plane ride which would have been ok except for the fact that he moulted leg hair into my shoes. Eeewwwwww.