I like flash sites, BUT only if it doesn't have too much fuzz and buzz if you know what I mean. Some flash based sites just have too much that I get a headache from all that stuff happening on my screen when I click a link. (an example is
http://www.isprime.com/ ... drives me nuts
)
btw, when I enter a site and they let me choose the html or flash version, I always take the html (I'm on cable, so speed isn't a reason why I shouldn't take the flash version).
If you plan to make a flash site, I'd recommend to not use every fancy detail you know but keep it professional and easy to navigate.
just my $0.02