My uncle drank Glenlivet all his life. It was his favorite, though I'm not sure how many he tried. I thought it was a very smooth whisky, but wasn't much different from your run-of-the-mill whiskies... just smoother is all. I read a few posts on here saying Glenlivet has too much spirit taste or burns too much. I didn't get that at all. Maybe a difference in bottlings? Glenlivet means "smooth flowing one".
If you like sweet, you might look for something matured in rum casks. The Balvenie 14 year old Carribean Rum Cask is fairly sweet and you can definitely taste the sugar! I mean, its not sweet like candy, but you can taste the taste of sugar. Like the taste you would get from sucking on rock candy.
Oh, and smokey peat can be sweet too. Sweet like a cigar would be.