I have about 300 bottles at home currently. I have an alcohol problem, but its not drinking, its buying.
The collection focus is on whiskeys, and that tends to be what I drink when I have one.
However, I think in general the best flavor to me is Cognac, I love Louis XIII, Pierre Ferrand Ancestral, Maison Surrenne Tonneau #1. There is also a fantastic tequila called Herradura Selection Suprema.
Why? Because I like the taste and the history around distillation.