I feel one aspect that is sorely overlooked by a lot of people when trying discuss 1st party Smash picks (or more niche 3rd parties) with any reasoning beyond "theyre cool
" is the appeal that character will or won't have to outsiders - or basically, the fundamental concept and design of the character once you strip away your emotional attachment to their personality and adventures. To a Kirby fan, Bandana Waddle Dee is an insecure hero who longs to be respected like his friends are, but to a non-fan, he's just a Goomba in a hat. While we all I know I'm no Geno fan, I can at least say he has a fundamentally fun concept and design - even if you don't know about him being a star taking a physical form or whatever, you can still see a cloaked puppet with go-go-gadget gun fingers and think "that's cool". People don't just give characters "cool ratings" for being in Smash alone, Smash needs to prove that they're cool, and the inherent non-personality-driven nature of a crossover fighting game (combined with Smash's probably-wise-but-still-limiting avoidance of dialogue) removes a lot of characters' ability to be cool.
It's part of the reason I've turned away from supporting Muddy Mole so avidly (alongside my shift to belief in a true COGH roster), he's just... a rodent who throws things. Not really too appealing without context.