Wow, tough one!
I am a bad mom in that I hate "playing". I just am not good at getting down and playing with trucks, action figures, dolls, etc. My husband is always on my case about not playing with DS (almost 3) more, but I just stink at it.
Arts and crafts projects I enjoy, but I am such a perfectionist that I have a hard time enjoying that with kids either. I have a hard time accepting that the projects aren't going to end up perfect. I do much better with older kids/tweens in this area.
Board games I am a stickler for playing the game correctly. I don't let my DS cheat or fix the game so he wins. I think it is important for kids to learn how to play by the rules early and to learn that they don't always win. We do play Candyland and Memory now and he does a pretty good job with it. I hate playing games with my tween nieces because they never follow the rules and get upset if I win.
I do think that I am a "FUN" parent though in that I follow all the kid and tween stuff like toys, books, music, etc. I pretty much know what is in and out. I love teen lit and I follow the entertainment world fairly closely so I know what is "cool" and "uncool". I also coach field hockey (ages 8-12) so I learn a lot from the girls. I also am a big experience person and love taking my nieces (and now son) all sorts of fun places.