I used to listen to modern Trance a bunch, but after a while I began to realize how utterly formulaic it all is and was turned off by it all. My sister was listening to di.fm's Euro-Trance station a while back and I couldn't help but point out how each song sounded exactly like the one before it. There is still some good stuff being put out, but not much.
Early Trance, on the other hand, is my cup o' tea. The stuff from '92 to '96 is especially good, as it has the tendency to turn my brain inside-out and tie it in a knot.
For what it's worth, Ishkur's EDM Guide details Trance pretty well (with samples to boot) as well as other Electronic genres. Di.fm's Classic Electronica station is also recommended for anyone who's interested.