While I do observe the philosophy of "Its My Railroad", I do proto-lance on my railroad. I follow a class one RR as my main objective, in this case the SOUTHERN, under steam. This is the proto part BUT, and its a big BUT, I also model what was in reality a RR that only had 12 miles of track total at any one time, the ALABAMA CENTRAL RAILWAY. However, I "changed" the circumstance of this part. I moved it to a more central part of my state, Made it a controlling partner, and have allowed it to have loco's that I personally like, that the SOUTHERN never had! I have a couple of SP engines, actually T&NO, a couple of rebuilt IC's, a N&W Y3a, 2-8-8-2, a C&O H5 2-6-6-2 and an H8 2-6-6-6. This is the free-lance part.
The whole thing is set up in the part of the state that I grew up in, and as a result am very familiar with. Even today I live no more than 80mi from where I was born and raised. The scenery will reflect that area in 1950.
So yes, you can have the free-lanced nightmare that was described by IH, and Charles, or you can have a RR like McClellan's V&O, Chubb's Sunset Lines, or Brooman's Utah Belt. A RR like these is what I'm striving for. A united theme, under a single concept. May not turn out as well as theirs did, but that's what I'm after.