I'd say it depends just how you feel about what you're saying. If you're actually thinking you're a hero, an idol, a true person, a God, superior than everyone else, etc, then yeh, ... I'm not gonna be having many conversations with such a person, but if you're just being silly and feeling a bit chuffed 'cause you did a good thing, what the hell; it's all gravy, and I'd say that's a normal feeling. We all probably get a warm, fuzzy feeling, whenever we do a good deed.

I'm not a fan of someone going out of their way to show-off their deed, making a huge deal about it, practically screaming "LOOK AT ME - I'm so awesome, because I did this", as, honestly, it seems a little self-absorbed, and even if it's unintentional, it can certainly come off that way. If you look hard enough on Facebook, you're bound to find someone who made a group all about this thing they did, and asks for likes, shares, etc; this is the sort of self-absorbed, insecure nonsense for which I don't care.

I suppose the whole thing can be a grey area, which is probably why people end up being so modest! xD I'd prefer to be modest, than have people thinking all sorts of nasty things about me.

^ I completely agree with that point.