These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alternative Character Interpretation: Ethan Crane got this a lot, as a lot of fans saw him as an asshole who treated both of his women like shit. He refused to cut bait on Gwen for her own mental well-being while refusing to allow Theresa to move on with her life.
Theresa and Gwen also qualify: Theresa's a batshit crazy stalker who can't deal with rejection, while Gwen is the poor cheated on woman who at worst, simply can't see that the man she is in love with is an asshole who doesn't love her but keeps leading her on because his reputation can't let him dump his longtime girlfriend for a crazy stalker he's fallen in love with.
Ass Pull: The writers pull this in the series finale. It is revealed that Gwen and Rebecca once went to Vegas together to get over Ethan. While there, Gwen got drunk and married a total stranger by an Elvis impersonator, therefore making her marriage to Ethan null and void so that Ethan and Theresa can be free to marry. Oh please!
Big Lipped Alligator Moment: When Theresa is giving birth to her son she, Gwen, and Ethan break character and start singing the theme song.
Broken Base : Fancy being introduced as Luis' new love interest. This lead to some pretty nasty internet board wars between Sheridan and Luis fans and Fancy and Luis fans.
And let's not talk about the fans who argue about Gwen and Theresa, always fighting over who's the better of the two and why. Despite Theresa having the majority of the fanbase on her side, this still happened nevertheless.
This is somewhat YMMV due to the at times the overly convoluted Villain plots and endless plot filler seemed to at times derail even the shows Crazy Awesome and paranormal elements.
Ensemble Darkhorse: Tabitha and Timmy. Fancy Crane also counts, given how her pairing with Luis caught on with fans and ultimately replaced Sheridan/Luis as the super-couple default couple. Not to mention Esme, Fancy's perpetually drunk and pill-popping best friend.
Also Fox Crane, when played by Justin Hartley. It's almost hard to believe there were a full three years of this show before he slid into town.
"Wait a minute. I know what's going on here!" (Note: He doesn't.)
Misaimed Fandom: Gwen; she does some extremely bad things that qualify as Moral Event Horizon crossing, but some fans generally justify it by pointing out that she's driven to these things by Ethan's manipulation of her.
Also Theresa pretending to be her friend just to get close to Ethan.
Theresa's rape of Ethan (disguising herself as Gwen and drugging his drink). Same goes for Sheridan: Fancy tries to prove to Luis that her attacker came back into her room, and to prove it, she says a button got ripped off from his shirt when she fought him off. Sheridan sees it first on the floor. She grabs it and keeps it for herself in order to try and convince Luis that Fancy is crazy and is only trying to get attention.
Ron the Death Eater: Gwen, full stop. While she isn't completely normal or innocent, both the fans and eventually the writers looked at her as the devil from almost the beginning, although fridge brilliance shows that Gwen would not have been so Flanderized if Theresa had not butted into the relationship to begin with (plus having someone like Rebecca for a mother as well as an absentee/dead father certainly doesn't help.) Remember that Ethan didn't even like Theresa in the beginning and thought she was a bit crazy.
Charity also got this treatment, since even the writers eventually preferred Kay with Miguel.