I watch this once a year and I'm not gonna lie-- it gets better every time. There's just a charm and a craft that I'm missing in most rom-coms these days. Maybe it's the structure, this idea of three different loves over the span of almost 20 years. It's a great concept and Brooks nails it.
Liked this movie the first time around and then saw the editor speak about it at my school. I revisited it after his personal comments and really liked it. If you open yourself up to it, the end is awesomely effective Hollywood cinema. If you skeptically approach it as something that's trying to emotionally manipulate you, then you're missing the point; you won't have an experience if you don't let yourself.