Niles's feelings for Daphne
I think about this a lot. I really love Niles and Daphne's relationship, but I wonder a lot about whether it is realistic to carry a torch for someone for years, especially when married to 2 other people. During the divorce episode, Niles flaunts the idea that maybe he too was to blame for the end of his marriage with Maris. While I agree with Frasier that it is not his fault the marriage ended, I also don't get why Niles spent so long trying to get back to Maris while he was in love with Daphne
This being said, I really do think Niles's feelings for Daphne are the show's crowning arch, the slow burn is delicious to watch.