alco, I have always modeled UP solely. although, to be honest with you, I cant really call what I am doing right now modeling... no room for a layout. however, i plan to get back into it full swing as soon as I can, so I spend some of my loose cash building a nice roster. so, its buy this here, detail that there, and so on.
when I got into all this as a kid I was mainly interested in modern diesels... only lately have I grown an appreciation for some other era's... I have a doodlebug in my collection, I am up to three E units as of today (all proto 2000's), I bought that 4-6-2 pacific today, and in my old collection I have some athearn BB PA-1's that I love... but would love it more if I could pick up a proto 2000 PA/B set. my thought is when I get around to modeling I will keep the period fairly ambiguous and just enjoy modeling UP in its glory. I still have a primary love for modern high hoods though. and anything in the SD-40 class.