Funbat
I've had 8 Funbat/sportbats. I loved the plane, it was fun to fly, simple to build, cheap and a good time.
None of mine lasted more than 15 flights with most of them averaging about 6.
Bad luck, pilot stupidity and a design that just isn't tough enogh. But other than that, they're a neat airplane.
Build a spad.
You know, if you built the wing from coro, that'd be worth a bunch more durability. The wing is a little thick and tended to be too draggy.