I usually find time travel in stories to be convoluted and often full of plot holes; but if done correctly they can be really fun. It seems to be one of those things that sounds awesome in practice and theory and no one seems to execute it quite well enough; or doesn't quadruple-check their story strands. Steins;gate is an amazing anime and one that showcases a great time-travel-esque story. I really enjoyed Looper, much more so than I thought I would. Other than that, the only other time-traveling movie I even remotely liked, and even then it wasn't all that great is The Time Machine with Guy Pearce. It's a fun little movie with some great moments from Pearce, whom I love to death and pretty much only enjoyed it because of him. But it was cool how they screwed with timelines, it just once again was full of plot holes and hypocrisies. I tried watching the original and I hated it.