I like to work on vehicles I've served on, like a 548, 113, 577, 109A5, 992, 109A6
1074, 1075, and so on.
it's fun to look at my pictures or to go to my track park to refference my model building from the real vehicles.
And my least favorite part is going to the field in these things and modeling the roadwheels ( I hate road wheels!!!).