My two main subjects are WWII to Modern military aircraft and anything science fiction. I also will do any type of model as long as the build is interesting.
I was originally wanting to do a lot of submarine builds, but unfortunately those models aren't exactly an extensive subject. WWII subs aside, most of them are simple tubes and the paint schemes are too simplistic. I know they're really a study in weathering most of the time, but I just lost interest in them.
I am currently working on the final stages of a 1/72 Revell F-5B in the Spanish Air Force livery, starting work on two Bandai 001 Star Destroyer models that I got aftermarket decals for (Admiral Thrawn's, and a standard one). As soon as I finish those I have a K-7 Space Station from Star Trek TOS that I need to paint.
I have a stack of old AMT/Ertl Star Trek models in my stash, a 1/32 Colonial Viper (moebius) from the original Battlestar Galactica with PE and the lighting kit, a 1/48 Hasegawa Harrier with PE, and some assorted 1/72 modern fighter jets. So I already have an unhealthy backlog to get through (heh).
I'm trying to build up my airbrushing skills currently, and I recently had a breakthrough. I'm finally getting some really solid line work and I'm able to control my overspray much better.