@Nineline, thats cheating! haha
@Yeti, Next time you get the itch to buy one think about the C-101. It's a great little aircraft, but i really enjoy the light attack and counter insurgency stuff.
I have every aircraft module though and I don't try to stay up to speed on all of them. I find the key is to have your favorties that you master and slowly rotate through the others. Flying the different mission profiles and in different era's helps keep DCS fresh. It takes me about a week to get up to speed in a module and then the next time you come back around to it it goes quicker.
It's also good to be part of a squadron. Scheduled events will some times call for a few people to fly a more obscure airframe and if you volunteer for that spot and spend the week leading up to the mission practicing its a good way to get back into your dustier planes.