I play mostly baskebtall and in terms of viewing, I often stick with basketball, rugby and cricket. But I usually stay up-to-date with lots of sports. Doesn't mean I have a deep and technical understanding of each, but hey it works. The sport I'm most familiar with is basketball.
My favorite to watch and play is hockey. It's fast and entertaining, and believe it or not, has a lot of really good pro leagues. I also enjoy playing and watching soccer, basketball (I only watch college) and only watching football (college mostly, but some NFL)
uhhhmm well just look at my name. i'll watch any type of soccer MLS, Euro, college, high school, anything. and i play too. but i also enjoy american football and volleyball
i dont really like sports XP. i mean the real sports games. but i always liked dodgeball, netball (probably not said this way in english) and a game called the king of the prisoners. but we stopped playing those games when we got to 7th grade. so since 7th grade i hated sports and gym classes.
i wouldnt watch it on tv either BUT.... for some reason watching a real game (non- official. a one where your friends play) can be funny and nice.
I'm a big fan of Canadian Football because I find it more entertaining than American. There's way more offensive, and I live in Canada so I can actually go to a CFL game :P
I used to watch a lot of poker too and IMO it is a sport :P
I like to watch NFL on TV, since there's not an "American" Football league in my country and I like the game. However, I prefer practicing tennis, it's a really enjoyable sport.