Michelle, I know it's sometimes hard to practice a dance you don't particularly like, but if you can spend some time working on Viennese waltz you should be able to get over the dizziness. I had that problem when I started, too, but I can't remember exactly why. With some classes and practice though, it became easier to dance and I didn't get as dizzy. Changing the direction of the turn semi-frequently can help avoid the problem, too. Sometimes at the end of the dance I'm a little dizzy because I didn't get a chance to unwind the last set of turns.

But if you do it right, you shouldn't get dizzy in Viennese waltz. It's really not quite as rotary as some people seem to believe. Yeah, you are turning more than in most dances, but the primary motion of the dance is linear, along LOD.
As for the original topic, I'm not sure I have a particular least favorite dance. I find merengue pretty boring because there's not much to do in the way of foot steps and I haven't learned much of it, so I can't do all the twisty, turny things everyone else does to make the dance interesting. Hustle looks fun, but I've never really learned it and may not because something about dancing a repeating 3 count pattern to 4 count music just doesn't go well with the musician in me. I wouldn't say I despise any particular dance though.
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James Marshall
marshall@astro.umd.edu http://www.astro.umd.edu/~marshall