I selected football cards and non-sports cards. I collect football cards and celebrity autographs. I do have a few baseball and basketball cards, but I don't consider those to be part of my "collection".
Anywho I personally collect Baseball, Football, Hockey and Non-Sport. My main focus is Vintage, and Current. OK so my two main Focuses (Foci?) are Vintage, Current, and Autos...My THREE main focuses are Vintage, Current, Autos and Group Breaks... Amongst my foci are...
I collect base there are too many sets I've started to collect just the base of and never got around to finishing. Some of the "chase" cards that they come up with now-days I don't always like or want so some of that stuff I either don't bother opening packs/boxes or I end up trying to trade or sell the ones I don't want/need.
Probably, not everyone collects every sport. I don't do basketball, well that isn't entirely true I recently started back with collecting just Baltimore/Washington Bullets (and Wizards somewhat) and players who were on that team, mostly just in their Washington Uniform. I know there are some folks that collect only one sport. Consider youself the TCZ Renaissance Collector! Be sure to put that on your liscense plate frame.
I voted Baseball and Football although I will dabble a little in basketball and hockey. I don't know enough about UFC to collect it and non-sports doesn't interest me. When I was younger, I was exclusively basketball but my interests lie elsewhere these days.
Baseball, mostly but not exclusively pre 1980. Tobacco, Japanese, late 50's and all Orioles
Football, 50s and 60s star cards, mostly Colts and a few modern Texan cards
Hockey, mostly 50s and 60s Rangers cards only
A few non-sports vintage tobacco inserts, and a few Mars Attacks and Horrors of War.