Well said, Ken, on both items..

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As you can see, I have a few 'heavy hitters' in my inventory. Two of those, the Venus II and Excelleron 90, are both intermediate pattern planes, capable of doing everything in the list all the way up to FAI level. But, I seem to gravitate to my trainer for the first few flights of the day just so I can 're-learn' what I may have forgotten since the last outting, and to sharpen my reflexes enough to fly those two capable birds. The training never ends.
I also put the trainer up just to do some lazy flying. As MinnFlyer says, 'fly the box' and relax.
Take Ken's advice and stick with something that you can learn on and develop skills. You will be much happier and perhaps a much safer flyer.