I have been flying for 2 1/2 years and when I fly a plane where I get complacent or it gets to easy I break out a Warbird or a 540 Edge and I get the Jitters again!
I love the rush of flying a different plane,they are all different,thats whats nice,when I don't get the jitters anymore I might start to get bored!
Good Luck and most of all.....HAVE FUN!