Living in Ohio with small vertical feet and a short and shitty season, I will ride anything because it is all I can get and I'm gonna get some! I do think being able to ride in all kinds of conditions does help with being a better overall rider (or so I tell myself when taking turns on over crowded slopes with bullet-proof ice or wet corn).
I really don't think I have a favorite condition. I do love smooth and fast groomers. Getting those first runs in the early a.m. when it is fast corduroy and the slopes are empty. I also have a blast at the end of the day when things are all chopped up and I'm just playing in the piles all the way down. Then again, I did maybe a dozen glade/powder runs when out west the last time and to say I had a perma-grin the rest of the day would be an understatement.