For me vodka is strictly used in mixed drinks, and I like to support Poland when I spend my money on vodka. As has been mentioned earlier Luksusova is a good bargain vodka as is Sobieski. I keep Ketel and Belvedere on hand for my friend who is a hard core vodka drinker. To put one of those brands in a Bloody Mary is for folks with more money than sense.
Turns out, she had a thing for me, and took advantage of my most corrupted status.