I wish you all had been around when I was younger. :-) It seems like one of the most important things is pick the right person to marry in the first place. I picked the wrong ones twice and quit. Never again.
My first FIL was a wonderful gentle man. I wish I could have found someone like him. He adored his wife. To the rest of us she was a demanding B****. To him she was his beautiful "Dolly". He carried around a photo of her in a bathing suit when she was in her late teens or early twenties. That is the photo he always showed if asked and that is how he saw her up until the day she died.
And even after she died he still said he was married and remembered their anniversay. He missed her up until the day he died.