I'm a 38G driver first, 38J driver second and 38L driver only if forced to

In the end I think it comes down to personal preference. Pick one and stick with it so you learn it all the way. Going back and forth between the G, J to the L is harder I think because of the increased roll rate and more sensitive controls. Interestingly enough as mir mentioned, there are comments out there from real 38 drivers who had to get used to the power assisted controls of the L after doing all the muscle work in the J.
Since the 80th is 38 squad, I won't say there is one preferred bird, as some of the guys fly Ls, some fly Js and some of us fly Gs.
Whichever 38 you fly, I think it best to stick with it until you figure it out.
And if you are at 400, you aren't furballing

If you see any of the 80th guys up in the arena give a yell and wing up. Otherwise Delirium, Silat, Stogey etc are trainers. Del runs a 38 clinic now and then too. He's a J driver, Silat flies the L.