I don't usually watch them although I get very teary at sentimental mush or just about anything emotional.
Five years ago, right after DH had a stroke, we were watching one, about a lady who goes back to her small town and meets an old flame.
A common post-stroke symptom is emotional lability - tears and laughter come very easily and at odd times. DH had this for a while.
At the end of the movie, the big emotional scene where he tells her he has always loved her, etc., DH and I are both tearing up, we looked at each other and cracked up laughing, cause it was so sappy and yet we couldn't help it.