I'm not saying that I would necessarily want to live forever, as I cannot know that. I certainly wouldn't want to if I had to be surrounded by JW nutters the whole time.
With that said it seems like when most of us think about it we think in terms of running out of things to do. We're human beings though, not human doings. Life isn't all about mastery of one thing or what's up next, there's tremendous joy to be had in just "being". Talking to people, connecting, enjoying the everyday things like the warmth of the sun or sound of the rain or just taking a walk through the woods and smelling the fresh air, all can be endlessly enjoyable.
I think I'm down with the possibility of everlasting life. It sounds good to me.