I don't actually get to fly them that much, but each of them has been flown at least 20 times, some more than others.
Well, it's hard to say what my favorite is. they all have their own unique characteristics.
I like the P-51 for it's scale look and 4 channel fun.
I like the Cessna and Citabria for their ability to fly slow enough to fly in a small space but still be able to handle more wind than the Ember or Vapor.
I like the Ember for it's slow flying fun on windless days.
I like the Micro Cub for it's nice scale looks and slow flying ability, although it won't fly in as small of an area as the Cessna or Citabria.
I love the Sukhoi for it's larger control surfaces for snap rolls and other 3D' ish maneuvers.
I sold my Vapor because I don't get much of a chance to fly indoors and I needed the money.
Over all I think it's a tough decision between the P-51 and the Sukhoi.
I think if I had the new Sukhoi, it would win