I'm fine with my own time. You never know what the future will be like. And even if it is a great technological eden, then you'll feel like you're parents and/or grandparents needing someone to help you operate even the most simplistic of future technology. Then there's the thought that the world might be destroyed in some apocalyptic scenario and civilization is gone and you're the last person on earth. Then there's the past. If you go too far back in time the tech you bring will be near useless, or will run out soon, you might even be burned alive as a witch for having access to such devices, and even if you weren't you've been too pampered by the tech and order in our society to survive or even tolerate it for very long. I'd keep it, but if I had to go I'd go back in time to when I was a little kid, and tell myself about life, lessons and things I wish I'd known back then. Then I'd dissolve out of existence, since me being there continously would result in a time-paradox and this universe would simply cease, caught in an infinite loop, and I'd be fine all over the map.