I'll have to answer this based on gay clients. While I consider myself homosexual, I don't feel like I'm drawn to something because of "gay culture" or who I prefer to er...have fun with.
The gay guys (read as those whose lives revolve around gay culture) who I've read for, all seem to like the cartoonish, and bright, colorful decks that give everything a happy spin to it. From my experience, the gay people I've read for don't want to hear the truth so much as how it's going to fit into their lifestyle and it should always be positive, regardless if it's in the reading. I have a hard time as a spiritual counselor telling these friends/clients that it's not as rosy as the cards or they depict it to be.
ANYWAYS
The bottom line, to answer your question, is, from my experience, decks that feature strong colors that are happy looking, fun, and not too serious.
(maybe the ones I've read for have been the stereotypically gay ones)...
Other gay (while you'd never know it) clients I've had, care more about the message than the cards themselves and haven't expressed being drawn to one more than the other.
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