I'm primarily an environment modeller as I prefer to focus on non-organic models, organic is easy enough but I find I get too obsessive over minor details which to me seems more important in an organic model. The first model I ever made was the Puddle Jumper from Stargate, for the Stargate Pack, very few people have seen the earlier attempts and I like to keep it that way, although version 3 is something I consider folio worthy even today. I have experience rigging, animating and some texturing though I'd love to just leave texturing to someone else entirely.
Game engines I have experience with include Unity and the Source Engine, source came first but I'd still say unity is more user friendly and the possibility for multiple platforms is a definite bonus. I'm only just getting into the Unreal Development Kit (UDK) and next on my list is the Cry Engine.
Most of what I know is self taught and because of what I've learnt and how long it took to learn it all, I want to make it easier for others to learn and get into modelling too, that's why I've started creating modelling tutorials. This is a bonus as not only does it help others (queue warm fuzzy feeling) but it shows that I know what I'm doing, or at the very least I can convincingly lie whilst pretending to know what I'm doing.