But usually I don't agree with it, in Obama's case I do.

It's not as if he brought lasting peace to some place that's been on fire for the last 3 decades, besides the prize was awarded way too early in his first term for him to have time enough to accomplish such a thing in the first place (after only 9 months).

My personal view on this is that he mostly received it because he wasn't Bush and they were trying to shame him into doing the right thing (which may have had a point) but I don't think that worked out too well.