Macallan 12: Sherried on the nose, subtle on the palate.
Balvenie 12 doublewood: Sherried on the nose, subtle on the palate (very similar to the Mac 12yr.)
Glenmorangie 10: Citrus. Too dry and young for my tastes.
Balvenie 15: Incredible whisky, full of spice, honey and vanilla notes, and a nice maltiness. This you should try! In fact, this bottle would be worth purchasing, as you will never tire of it.
Glenmorangie 15 and Nectar: Skip the 15yr, but find a bottle of the Sample Pack that includes a bottle of the Glenmorangie Original with all three sample bottles of their "finished" whiskies: Lasanta, Quinta Ruban & Nectar D'Or.
Glenrothes [select] reserve: A very good whisky that has complexity to it. You should train your palate with this one, as you should be able to pick out dried fruits, citrus, vanilla, and spice. It took me a while to get the dried fruits, as they are a bit subtle behind the dry finish. The vintage bottlings are much smoother than the Select Reserve, but it is still very good.
Macallan 15 oak: This will taste like oak. Do you like drinking oak? I don't feel the need to spend $70 on a bottle of oak. Seriously, I would suggest you "trying before you buy" when it comes to this one. Have I tasted it? No. Because I have read too many reviews and listened to too many whisky experts to spend money on something I know I won't like. I have tasted other oaky whiskies, and so I can informatively pass on this one. The 18yr, however, is sherry finished, and is much like the 12yr except smoother. Not worth the money, in my opinion.
I am tending towards the sweeter and perhaps sherried varieties, but can't be sure
Check out my write up on the Informal Aberlour Tasting
, as those are all nicely sherried whiskies that have a sweeter profile. Other than the 10yr, they are all exceptional whiskies I wouldn't hesitate to recommend.