You're right, it is kind of fun and easy to get into. The scenery in add ons can be much better than the default, think ORBX for Rail works..
Agreed rw can be fun. What engines do you drive these days? I'm looking for a career change soon, and the Railways look like a good option. Do you have to be a graduate to drive & what are the 'tests' like?
I'm in the UK so it will be quite different from America, you do not need to be a graduate, but the recruitment, selection process and tests are quite tough, they say for 8 or 9 positions 3000 applicants will apply for the Trainnee positions.
I love it, I was an engineering manager before and really wanted a career change and it was the best decision I done, the pay and working conditions are very good.
I drive 315's, 317's and 379's