Tried snails at school during French, wasn't very impressed tbh.
Gnats/Midges/Noseeums are very sweet, sweeter than sugar and I'll eat them if I get one. It pay's them back for biting me.
Xylaria, I haven't tried the sweet leaf yet, but I'm going to! Although saying that, I have tried the sticky leaves on the native lime tree, are the aphids the cause of that?