I think being too nice is a bad thing because one, people can take advantage of you, two, people might think you are a phony and trying to manipulate. Plus people give you crap for it. Plus I have noticed when people are being "nice" they are actually lying because they are not saying what they mean so I cringe now when I hear "Oh I said that to be nice" or "oh I did that to be nice." So they didn't mean what they did or meant what they said? I learned this from my husband because he say things and then he tell me "Oh I told them that to be nice" and I learned after a while it means to be a phony because you aren't saying what you mean, you're lying.
Yep I learned all this in the past four years. Oh yeah if you tell me "I said that just to be nice" I am going to be questioning everything else you say because I will be wondering if you are just saying that to be nice and what are you really thinking instead. I will be reading into everything you say and might be misreading between the lines all of a sudden because of that one time. I would be thinking of you as some phony and wonder what are you really saying. That goes for when you say "I did that just to be nice" I will then be questioning all your other actions and wonder if you really meant it or was it just to be nice just for a show. It doesn't matter if it was to me or not, if it was about another person, I will be questioning your every moves that is nice because I won't know if it's genuine or "just to be nice." But I don't do this to my husband because he doesn't lie to me, only to other people.