I don't have ONE of choice, I tend to try many of them, I have several brands I come back to over and over though.
For favorite brands I like Oban, Aberlour, Auchentoshan, Ardbeg, Bunnaihabhain and Highland Park probably the most.
Just recently I picked up some Caol Ila which is really nice, has everything I like about a good Islay malt.
I haven't had glenrothes yet, but I love Talisker, nice little chile pepper of a scotch lol
A lot of people saying the Balvenie 12yr. doublewood
Pure addiction! As a Scotch beginner I bought a bottle yesterday and today I have a half bottle. It's the best tasting scotch I have ever had. Must buy more Scotch...