Too NIce

Is there such a thing as being too nice? My roommies have said lately that I'm too nice. Is there such a thing? Is it a bad thing? If we're all hanging out in the basement and I want a drink, why not offer to get others something? I'm already going that way, why not offer? I think it just boils down to the whole idea of do unto others...I'd like for someone else to offer to get me a drink if they're going that 3way. And that's not to imply that they aren't doing that...they do, I was just using the drink situation as an example. I even took the "What Marvel hero or villan are you?" and I ended up with do-gooder Spiderman.