Wow! I love all the diverse answers and appreciate your replies very much. I started this hobby recently and through these forums and other resources I've learned so much but most importantly - Slow down & plan it out, but most important, find out what you really want to do. This is a long-term project not to be taken hastily.
Anyway thanks again.
I haven't picked an era yet. I love love LOVE steam engines so I'm leaning toward late 1800's. Though I ALMOST love just as much the early diesels and electrics.
I'm new to the Colorado area, recently moved from my home state of Texas. So I think I want to do some late 1800's D&RGW for the ~new~ local flavor and I can learn some of the local RR history as I go. The scenery is quite nice as well!
Anyway, thanks for clicking, and especially thanks for your replies. I look forward to learning more about you folks and your hobby!