I know of someone married to a man with bipolar disorder (manic-depression), who was diagnosed a few years before they got married. She was told after the 3rd date, and is very happily married now for many years.
Turning down a shidduch because the other person has a chisaron is not very smart imho. My spouse also has chesronos, as do I. We made a cheshbon if the chesronos were ones we could live with, given the maalos.