I will give my advice for people starting out.
Single malts:
Peated Whisky (anything that is a smokey flavor) + A little GOOD CLEAN water.
Non Peated Whisky (tastes like what MOST people think whisky should taste like) No water, generally. I DO add some on occasion though but it is a few drops of water to 'release' the aromas.
Blended Whisky and whiskEy (the E is normally added in the US and Canada on bourbons) + water IF you are dealing with a high proof whiskey. Some of the recently popular blended bourbons are so strong that drinking them straight is a waste of good whiskey. They are not designed to be neat. I also drink bourbon with ICE. But not when first trying new ones..Since I want to really taste it without ice the first few times.
Hope this helps on the water front.
GLASSES:
Single malt:
I have 2 kinds for single malts, a Riedel Single Malt 'tulip' glass
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And a closed single malt glass (blenders glass it is sometimes called):
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For Bourbons I use the same if I am sampling new bottles, but then for relaxing there is nothing better than a nice heavy tumbler:
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Hope that helps mate!