I disagree that my optimism or positivity is a bad thing. And quite honestly when you're around someone who is negative all the time it really drains the life out of you and you find yourself not wanting to be around that person.

Sure, there are differences in culture, but I don't think that someone's optimism about something specific should be to blame. I'm sure my opinions about life in general are different from someone else's...but I'm not unrealistic about it. If I find something to be absolutely beautiful I'm surely gonna sound positive about it. It's usually people that I tend to be negative about. But everything else can be seen in an optimistic view...or at least it is to me.