me too. I think asking "do I/we exist?" misses the point because it's using misleading, ambiguous language. as far as I can tell, we're the imagination of ourselves.
rene descartes walks into a bar and sits down. the bartender comes up to him and asks, "would you like your usual mr descartes?" he considers this for a moment before responding, "i think not..." and then POOF! he disappeared