Looks like Al has the drink suggestions for Vodka covered. My goto potato vodka is Luksusowa. It is as good as any other potato vodka I have tasted and it is actually pretty inexpensive. I like the taste of potato vodka better, especially straight and chilled or in a Vodkatini.
I also like to make green peppercorn flavored vodka. I take about 30 green peppercorns and place them into a large mason jar. Put in a bottle of vodka (I generally use Russian Standard) and let sit for 12-24 hours, the longer it stands the more peppery it tastes. Then pour the vodka back into it's bottle, cap it back up and place into the freezer. Excellent for sipping on hot days and makes an excellent Bloody Mary.