Lockjaw, the royal family's Big Friendly Dog with teleporting powers. Most online comments have basically been "[Negative remark about the show]... but I loved Lockjaw!" It helps that, as you’re probably assuming already if you’ve read the above tropes, he’s the only character we’re supposed to like that you actually can root for.
Louise, mainly for being one of the more relatable human characters in the cast, her Les Yay with Medusa, and her certain resemblance to Felicity Smoak before season 3 looks and personality-wise.
Much like Lockjaw from Inhumans, everyone loves Old Lace the Deinonychus. Especially popular is that the design manages to incorporate feathers like it's now known dinosaurs had, while still not messing too much with the classic image of them.
Claire Temple received a lot of praise for her Good Is Not SoftBeware the Nice Ones moments while still being sympathetic and supportive of Matt. It's a refreshing break from the stereotypical female love interest on superhero television as well as a strong performance from Rosario Dawson. Many bemoan how wasted she is in the first season of Daredevil (2015) when it was clear that Dawson is only an Advertised Extra. Then this turned to excitement when she was revealed to actually be the connecting thread between every Netflix series, much like Coulson was in the Phase 1 films. Unfortunately averted when she started to be written as a holier than thou character. She eventually become such a Scrappy that she was written out of Luke Cage Season 2, with Cage himself dismissing her.
Rafael Scarfe, for being a great foil to Misty Knight, as well as being incredibly sassy. Sadly, he's also a Dirty Cop, but that just gives him excuse to sass Cottonmouth as well.
Cornell "Cottonmouth" Stokes. Audiences were outraged when he died only halfway into the first season, and Diamondback, who took his spot as Big Bad, is widely regarded as inferior.
Shades is also very popular with fans, largely to his Magnificent Bastard tendencies and Theo Rossi's incredibly smooth performance. Made even better that he actually manages to survive the entire season.
There's the Drunken Master Zhou Cheng who Danny fights, distinguished not only by his amusing personality but by being one of the few Hand members to not only nearly win against Danny, but show a degree of honor while doing it, something his compatriots were clearlylacking.
Mary Walker. Already a fan favorite from the comic, here Mary was played to perfection by the talented Alice Eve who managed to effectively play two contrasting roles. Even more impressive is that each alter is a Rounded Character with different motivations and is not defined by their relationships to each other. Prior to news of the series' cancellation, both reviewers and fans were clamoring for more of Mary in season 3 and the inevitable debut of Bloody Mary.
Beth is this after her introductory episode, showing us a glimpse of what Frank's life would be like if chose to stop punishing.
Ringo. He's the bouncer for Beth's club who assists Frank in the bar brawl, tanking a lot of damage and even snapping a mercenary's neck after getting stabbed several times. He needed a lot of bullets to be put down for good. Whenever he's brought up in the forums, people pay respect.