My AW switched to Vodka a year or so ago. Before that, she was on a Jack Daniels kick, and Crown Royal before that. Daughter and I found a stash of a couple dozen of those little blue Crown Royal bags stuffed into a cabinet; that's when we realized just how bad her drinking was.
I suppose I can take some comfort in the fact that she switched to vodka; it's probably saving us a lot of money, considering how much Crown Royal and Jack Daniels cost.
I'm not sure why she switched... I'm thinking that her drinking buddy told her that its odor is less noticeable (even though we can still smell it across the room when she's really sauced). AW usually lights scented candles and dumps Old Spice on herself when she's drinking... apparently she thinks we won't notice that she can't talk or walk straight.