My sports card collection consists of quite a few different players and teams.
MLB: The Chicago Cubs. I collect anything of the Cubs I don't have as long as it's a Cub card. And Giancarlo Stanton.
NBA: Michael Jordan, Stephon Marbury, Kobe Bryant, Allen Iverson, Deron Williams, Kevin Durant, Russell Westbrook, Garnett, V. Carter, Raja Bell, Shaq, Utah Jazz and cool cards of random star players/HOFers
NFL: Randy Moss, Adrian Peterson and the Minnesota Vikings.
And Nascar, I collect Elliott Sadler.
I also collect star player Topps Chrome RC's in NBA, NFL and MLB. Also, RC's of star players who don't have Chrome.
I am always looking to trade for anything I don't have of the above mentioned players/teams. I can also sell if you're interested in anything.
Here is a link to my Photobucket: http://s7.photobucket.com/albums/y280/starxbury/