Triple.Fi10: The sound is extremely dependent on the fit. Once you get a good fit, the sound is amazing. Of course, it's also huge, uncomfortable, and the cable sucks.
Etymotic ER4p: It's very analytical, and the best iem for classical. It manages to be accurate while being fun. Isolation is great, comfort is decent, but the cable is extremely microphonic. No way to wear it over the ear, either.
Shure SE530: It's my new favorite. Not the most accurate, but it's very musical, and fun. I put them on (in?) and the world around me just disappears. I don't have a care in the world. It's also extremely comfortable.
I now only have the SE530.