Aaaah, it all depends, but great thread!
When it comes down to specifically moves in the field, I love to perform forward inside twizzles, lots of fun are also hydroblading (backward inside) and sort of besti squat? Similar to the one done by Elizaveta in this years short:
http://www.youtube.com/watch?v=m43_TjSeNSc&t=155s, except I do them on an outside edge.
Though I love all of the above, the one that I do best and also like is Ina Bauer. I don't have the back arched yet, but it's still nice. At least I hope so.
Other than that (because I see other also mentioned them), my CoE spiral is pretty good and fun to perform. I can't do a nice split jump (either russian or the true one) but it's sooooo much fun.
When it comes to watching these moves, I think my favourite is a nice spread eagle, especially on an outside edge, maybe because I can't do a proper one.

I also adore Sasha's russian split jumps and perfect Ina Bauers with a nice arch, like Caroline Zhang and Shizuka do. I don't fancy the ones with the back straight.
Just to add, I love milions of twizzles and other turns/little spins in step sequences, it makes them so lovely.
Here's a program by Scott Williams that contains the best moves in the field in one place.
http://www.youtube.com/watch?v=H1D5dE7Rzvc
Flying death drop (huuuge) with a really short spin at 0:30, russian split to cantilever to spread eagle at 1:13, rolling on the ice at 1:39, death drop again at 2:30, this time without a spin, some non-listed jumps I can't recognize, spread eagle into push-ups at 3:00, an axel with a shot-the-duck position in the air with forward landing
(!) at 3:38.
And then, ladies and gentlemen,
the coolest trick ever - barrel rolls starting at 3:50. I haven't seen them performed by any other figure skater, though. I've listed just the best moves, this program is packed with them.