Let's start the discussion....

Post what you like to wear under your pants. I'll start.

I'm a briefs guy. I wear all colors and brands. I have a huge collection.

I mainly wear boxer briefs. I wear briefs when I go to the gym or run.

Boxers are no good - no support, they just lket your junk bounce around, and to top it off I've had my balls crushed or flicked; the legs round up a bit and I sat down. Was quite painful and enough to discourage any further boxer wearing

Yeah, boxers are no good for me either. I tried boxer briefs a while ago but my thighs are pretty big and they would always get holes at the seems in the thighs. Even expensive brands would have holes after just a few wears. 

I'm a switcheroo kinda person.  I like briefs sometimes, then I'll go on a BB kick for a long time.  Then suddenly without warning, I'll change right back to briefs.  It's just a mood thing for me.  I never wear boxers though unless I'm absolutely out of underwear that is clean and that is almost never.  (Hell, I'm a gay man, we all have tons of great underwear dont we?)  :)

I go commando 24-7; I really don't like the feel of any kind of underwear. Boxers are only an extra layer; if you keep everything clean then why bother. Briefs just never feel right for me especially the butt part; I used to wear to wear thongs but somehow didn't need them anymore either  

I prefer boxers or boxer briefs, especially FTL. Those are my favorite. I will sometimes sport briefs but that is on random days and times, I choose the boxer briefs when going out in a pair of low rise jeans but boxers are for the loose jeans with just a little waste band showing when they are low. Either way I always show some banding since thats what turns me on is seeing the brand your wearing and sometimes just enough to get a glimps of type. I will also go commando if I have to find some clothes quick but mostly its boxer briefs or briefs. Like said before by cp04 running out of underwear is hard when we have lots of it. But right now I'm wearing some Levis Boxers and they are very comfortable.

I switch it all up between boxers, boxer briefs, briefs and camando.

Well, personally, I wear boxers. Briefs do sound more comfortable, though.

Well I wear briefs for work and then on my time off I like the freedom of boxers.

I love to wear Boxer Briefs, specificly BVD or FTL. I will wear the occasional briefs, but also since I am in the army I will just go comando when in Uniform since its very comfortable. But I find a guy in Boxer Briefs very hot.