I'll bite.
Raspberry Absolut with 7-Up, mix with anything other than 7-Up and it's not quite right. It will mess you up in a hurry though so be careful.
As for other vodkas, to me Gray Goose is alright. I'm partial to Absolut though however only mixed with Squirt, yummy.
There are a couple of others that I have had that are quite nice, can't remember them though, sorry. Effen vodka to me not so good, Shakers and Skyy bleh. Stoli, yup, good stuff.
I'll probably get back to this post, a year ago I was on a vodka kick, killed too many brain cells, not that I had too many to start with, can't remember all the names.