Hmm...I use amazing sometimes......like when someone really helps me out..like they go out of their way to do so, I'll say thank you, you were amazing....
I wonder if that annoys them?
lol I wouldn't worry about it!!
There are much bigger things to stress over than the word "amazing"...and if someone gets annoyed by you telling them they were amazing....then I suppose they're not really that amazing afterall!!