In general I like coconut/brown sugar aromas, but Mandalay Bay way overdoes it, and I can't stand it for long. Mirage also, I seem to recall. Just too much.
Ven/Pal is suffocating, old lady perfume smell. I avoid the place because of it.
Wynn and Bellagio...ahh. Wonderful fresh 'nothing' to the senses. Probably why I like those two best of all.
Caesars is old cigar when you first walk into the casino. I get used to it, but don't like it. For a while it seemed to improve, but last time was strong.