The pick for many will be the Ardbeg - which is smokey, tarry and has lemon. Demand is usually high for this distillery, so this one's only available by ballot! If you're looking for unpeated whisky, the Benrinnes is a delight - beautifully balanced and subtle, with floral notes and fudge.
I'm a sucker for bourbon casked Dalmore, and this one may be simple but it's exactly what I wanted - pears, green apples, and custard.
The remaining three are also pretty good, but stand in the shadows of those three. Still, it's worth getting to the rooms and trying them all!