On a typical day, I usually go back home with what I brought. But now and then, things don't go so smoothly. I'm happy to say that rarely do I crash anymore because of "dumb thumbs." If I go in, it's generally because of wind or other factors. I'm working hard on building finesse and general competence, so if I try anything out of the ordinary (loops, rolls, inverted, etc.), it will be at a safe altitude.
But having said that, I took my FT Mustang out with some friends last Saturday. I'd crashed it a few times during maidens... just lost control for some reason... which turned out to be bad solder joints at the battery/ESC plug causing brownouts. SO - with all of that repaired, I took my slightly wrinkled Mustang up for its first real maiden, and it was amazing. Didn't even need to adjust trims, it was brilliant... and then cleverly flew it into my friend's house. Damage from that was actually minor, and I had it flying again shortly. Then a couple of flights later I launched it, then went for the TX... and missed the stick. The Mustang crashed hard, and is on my workbench as we speak, awaiting further fixes. That said, both of my friends also crashed hard the same day, mostly because we were all having a great time on a beautiful day, and were pushing the limits just a bit. ;-)
But yeah, under normal circumstances I can usually run through a few batteries with no crashes.
G