Hello, This here forum was the reason I finally registered at Eurobricks... I've been interested in trains since I was little (one of the few remaining narrow-gauge railroads in the US, the East Broad Top Railrod, is not far from my house, and I first rode it when I was 4 years old), and when I was 11, my parents got me the 7722 4.5v battery-operated train, for which my dad made some custom Pennsylvania Railroad decals :D Unfortunately, I ended up giving it away when I went into my first dark age.
More recently, I got back into LEGO trains when I discovered that they were actually CHEAPER than most N and HO scale stuff, not to mention more mod-friendly. ;) I bought one of the latest Hogwarts Express sets at the local Borders at a significant discount (should have probably bought two, but oh well), and the Toy Story train... Both of those are currently undergoing significant revisions (I'm designing new/improved rolling stock for the Hogwarts Express, and trying to turn the Toy Story Train into something more realistic looking to serve as my "Wasteland Express" for my post-apocalyptic dieselpunk setting), and thus far, I've only managed to get three cars done on the Toy Story Train revision.
Elsewise, I've been taking major advantage of Pick A Brick's availability of train parts to design/build custom trains...
The first one that I've completed was my Balin & Sons Mining Company RR narrow-gauge Heisler locomotive and Ore-Hopper car (made by combining the two ore carts from the Indiana Jones set):
NGTrain2 by Hikaro Takayama, on Flickr
...and my next major project is to place a PaB order for parts to re-build the Hogwarts Express coach into a First-Class/Dining car and build an additional Coach as well as to build this:
LDD GG-2a LEGO Locomotive by Hikaro Takayama, on Flickr
My GG-2 Electic Locomotive (it's supposed to be in the Norfolk-Southern livery, NS being one of the few major corporations to survive the Final War), which I came up with as a retro-futuristic re-vamping of the Pennsylvania RR GG-1 locomotive (i.e. additional headlights, modern-style pantographs, etc)...
I'm happy to find a forum for fellow LEGO Train enthusiasts... I recognize Sava the Aggie from Classic Castle, though. ;)