Is Immortality really that bad?

[Balin999]

I for my part don't want to be immortal. Where are the advantages? I guess you get so tired of the world after some thousand years. You lose countless friends who are not immortal, and I guess after some time you understand that everything is more or less the same.

But something that made me think in willkill's post was the line with "how cool it would be to be a great warrior".
Do you really think it is THAT entertaining to be on war? See your friends die, kill your opponents, get hurt, see slaughtered people lying around, and much more? Maybe you should ask some veterans of World War II or some soldiers in Iraq if they thought that being a warrior was "cool". (I guess you never had to do military service.)
I never want to be on war, be it in Middle-Earth or in real life. Just my opinion, though.