Can't really offer any justification for it, but I love a cold pint of Belhaven Best. Maybe it's just because it's a Scottish beer and so reminds me of home while being down in London for uni, but damn son, it's nice. I also became a fan of Staropramen while travelling in Eastern Europe. I'm not a beer snob, I tend to like anything of decent quality (i.e. I hate Budweiser and Stella because they just plain taste bad), regardless of their "prestige" or whatever.
When it comes to non-beers, I drink a lot of Captain Morgan's rum. I can't afford nice spirits and it'd be a waste anyway considering I drink them in large quantities when going out, without much appreciation for flavour beyond "this doesn't make my oesophagus want to kill itself." I've also started to enjoy wine a lot more in recent years, though I don't know enough about it to pinpoint what brands/whatever I particularly like/dislike.