Another good one is

No Slime! I am so glad I went gas as there isn't any slime to clean up anymore. My YS 140dz would just cake it on my Ultimate. It was so gross!

Lastly (I just made the switch to 50cc and bigger) what I enjoy about flying most now is the lack of equipment to lug around. No more charging glow sticks, putting them on the engine, carrying around the heavy duty starter motor, and no more 20+ dollar fuel. (Granted with gas prices increasing that may change ). Its just so nice to fill up, flip, and go.

I certainly agree with everyone that says, once you go big, you don't go back.