I like trance, sorta... ok, not really. I like some of the derivitives of trance, but not trance...
But when it comes to dance music in general, to find more of something you like, look up the remixer's original works. So if you haven't already, you should look up Ferry Corsten/System F, Airwave, Moogwai, Above & Beyond, and Wippenberg. This applies to any remixer. And it can apply the other way around. Meaning if you like an artist's original works, you'll probably like their remixes.
You can look up all of the Ayu Trance remixers too. They're all really well-known trance artists.
I also totally suggest you check out the radio station WoeD at
http://woed.de/ (its only availible outside of Germany by internet stream) That radio station is where i get a lot of my dance music from.
Personally, I'm a fan of Hands-Up and I dabble in Jumpstyle and Electro. Maybe you should check out artists like TUNE UP!, ROB MAYTH, Pulsedriver (which has some hands up), Alex M. vs. Marc Van Damme, Megara vs. DJ Lee, VERANO, Mainfeild, Discotronic, Dan Winter, Manian, Topmodelz (they have a lot of covers of 80's music, if you're into that kind of thing) Punkrockerz, Ultra Flirt, SIRIA, Nordic Stars, AKIRA, and, yes, the infamous CASCADA. (which, btw, Manian, SIRIA, TUNE UP!, and AKIRA are from the same djs as CASCADA.) Those are some of the Hands Up artists, but there's a ton more. As you find more remixers, you'll find which artists you like most.
Electro: Mondo, Alex M. (the electro alias of hands up artist Alex Megane), 2-4 Grooves (my favorite), Michael Mind, Dany Wild, and Phunk Foundation.
Jumpstyle (I don't know many): Rico NL, DJ Lanai, Picco vs. Jens O.
That's all I can come up with, right now. But a lot of times, singles will have a "jumpstyle mix" with no credited remixer. And the same with electro.
Pretty much every artist I just listed is availible on iTunes, so if you have it, you can look them up.
If you don't mind paying extra and waiting on shipping, you can buy some of the Quake Trance or Exit Trance compilations from YesAsia.com or Amazon.com or eBay.com.
That's pretty much everything I've got... Hope I helped!