It’s all personal taste but I couldn’t agree more about no ice. I think whiskey should be drank at room temperature and also ice gradually dilutes the whiskey. Many whiskeys don’t even need water, I only add it with anything over 46 vol and of course with cask strengths water is essential.
I’ve got a collection of around 130 bottles, mostly scotch ( Islay my favourite) Irish, Japanese and many over places although NO yank or Canadian stuff. Again it’s all down to personal taste.
If people like to add mixers that’s fine but a tip I learned many years ago was that if a whiskey has got an age statement, say 16 years, then keep it in your mouth doing a gentle ‘mouthwash’ for a minimum of 16 seconds, once your saliva starts working with it the taste can change two or three times. So many people don’t like whiskey because if they are having it neat they suddenly start acting like John fucking Wayne, bung it down their throat and demand another one. Having said that I forgive John as he was drinking that yank shit.