i'm kind of obsessed with time travel right now. It seems like a very current topic (Star Trek movie) and so, people are writing about it (Sean Carroll for Discover Magazine). Plus, i'm reading The Time Traveler's Wife (btw, good book so far). But back to what Sean Carroll wrote... kind of my way of thinking... based on science, and/or hard facts and not some bendable rules that movies tend to use.
I'm not saying i want to travel to the past or to the future, but i like thinking about the benefits and the difficulties that this kind of travel has.... and (most importantly) the consequences.