I like my gin martinis made with Bombay Sapphire, up, dry and a little dirty, just like me! For G&Ts I like regular Tanqueray gin because the jumiper taste goes well with the lime and tonic. Beefeater is good, too. What makes Gin good? Good gin is smoother and more refined. Seagrams is bilge water.
My favorite vodka is Smirnoff black, if I'm just drinking vodka. If I'm mixing it with anything, it's 100° Wolfschmidt.
Right now my favorite Bourbon is Eagle Rare Single Barrel 10. Smooth as silk! I tried Ezra Brooks because of Lawrence, though and Ezra 90° is all you really ever need in a bourbon!
For Canadian, I actually prefer Canadian Hunter to Crown Royal. It's smoother and is $16 for a 1.5 liter. Can't lose.
The best Absinthe to me is LaClandestine Lebleue and and DuPlais Verte. Ridge Distillery in Montana makes one comparable to DuPlais, though.
I prefer Mezcal to tequila, because to me it has more character and flavor. If I do drink tequila, I'll go with Patron' Silver. Most "Top Shelf" tequilas are way overrated and over priced. If you do get the urge to spend an ass load of money on Mexican cactus juice, go with Don Julio 1942.
For Rum, the best is Metusalem, but I go for Blackbeard Rum when I'm in the Caymans. It's the only place you can get that stuff.