"Eternal Sunshine of the Spotless Mind" is one of my favourites films ever, absolutely wonderful. I would add to this list the "Before..." trilogy (Before Sunrise, Before Sunset and Before Midnight) these are three of the most realistic and well written love movies you'll ever see, Ethan Hawke and Julie Delpy have a lot of chemistry and Richard Linklater's direction is flawless, it's definitely something worth checking out