Good old 401 and all the time I've spent on it
It's sort of like my one-man VA - I always fly actual scheduled routes and use FSPassengers, and so it only made sense that I would want to get in on an airline and stick with it. I ended up semi-randomly picking US airways back in the day (liked their early 2000s livery on some of the first payware planes I bought), and have since flown 400+ hours on Boeing and Embraer jets doing their routes. I keep meaning to add Airbus to that list, but keeping my skills sharp in even a couple of complex planes is enough work!
I might join an actual VA someday, but I like the flexibility of managing my own rules.