I believe neat is the only way to enjoy a good whiskey or cognac, why would you ruin a good whiskey/cognac with ice or water? 
Water interacts with alcohol in interesting ways. If you visit a distillery that makes products intended for direct consumption (as opposed to ones making a product designed to be mixed) they'll serve their product with a small amount of water on the side. It's expected for you to taste the whisky both neat and with water, because the experience is very different. I've tasted some magnificent whiskys that were enhanced by water, and some that were destroyed by it. Simply saying that adding water ruins whisky is a pretty narrow view of a very complex subject.
Again i'm no pro and not much of a drinker, my palate is more discerning towardss flavors of food than drink, and my true drink of choice is tea, i digress again.... just a habit of preference ... or is it preference of habit?

You're right about the narrow view! Since all i prefer to drink are Macallan, Oban, Kelt Grand Champagne, and Hennessy VSOP or higher

Yes, I know, the last two aren't whiskey, but neither are Macallan and Oban!!!!! continue below...
Now this gets interesting:
We can get technical about this topic post,
irritatingly technical. The OP clearly inquired about "whiskey" and I admire how Tom_G addressed my preference of Macallan and Oban (
without water) as "whisky" because there
is a difference and Tom_G made the difference irrevocably relevant. I guess this also depends on who you ask, but it is generally understood that "whiskey" refers to distilled spirits from a mash of fermented grains made in "E-having-countries" America and Ireland, and "whisky" refers to distilled spirits made from a mash of fermented grains made in "non-E-having-countries" most notably Scotland, Japan, and Canadaland. It is just how said countries prefer to spell it. (Is it habit of preference or preference of habit?

) Both "whiskey" and "whisky" are encompassing terms that refer to distilled spirits from a mash of fermented grains.
The difference is that each country is subject to produce spirits specified by their laws. Therefore anybody could argue that the OP inquired
only about distilled spirits made from a mash of fermented grains produced in America and/or Ireland, rendering my opinions, and anyone else's, specifically of Macallan and Oban (since that's all I've tried) and other Scotches, with or without water, and both being Scottish whiskies, technically
invalid in terms of the OP's original inquiry.
But there are so many mentions of Scotch here the OP should change the topic!

Whiskey plural is Whiskeys
Whisky plural is Whiskies