I adore Bookers. It is very sweet and warming and the oiliness makes sure the flavour stays with you to the next morning. Sadly it's no longer available in the UK.

George T Stagg is wonderful too, but perhaps the rye bitterness would offend some. From the same stable, Sazerac Rye (not a Bourbon, I know) shows the true flavour of rye in the mashbill - a useful reference point. William Larue Weller, in the same stable, shows the toffee and chocolate flavours of a high class wheated whiskey.

Four Roses Single Barrel also gets my vote - sweet and complex.

Currently working through a bottle of Parker's Heritage Collection cask strength bourbon. Not in the same league as the Buffalo Trace offerings but good enough. Perhaps a wee bit astringent.

Worst was Mellow Corn (another not-Bourbon in the pure corn style). It started out nice but turned oily and cloying. Nasty. Can't say Rebel Yell did it for me either. Something astringent and one dimensional about it.