I really don't like playing as Lylat Cruise cause I have trouble steering my ship. (jk).
Ah-ha, you beat me to it cx
But yeah... I literally cannot play 75m. The awful layout and mix of obstacles make it impossible to have a good game on. It's literally a game of king of the hill, fighting over platforms, and if you try to use the only large platform in the stage you get bombarded with DK and the springs... Hell, even the other parts of the stage are annoying because of the flames and the falling springs.
Character-wise? Probably Meta, Ness and Olimar.

because his range makes him a pain to use well. That and most of his moves are pretty laggy. It's a shame because I like his actual character. but I just can't use him, not too well anyway.

mostly because of his recovery. To me (personally, don't jump down my throat), it's comparable to Little Mac's. If you mess up his UpB, the angle you hit from or missing Ness, you will die. I know his double jump is good compared to all of Little Mac's recovery option combined, but if you get gimped, it's all down to his UpB, which I dislike greatly. The rest of his moveset is ok, but... I just don't get why he's got so much hype behind him. His design... It's pretty bland. He's a kid with derpy eyes and a baseball bat that can use PSI. The rest of the cast are just more interesting to me. Is it just hype from the games he's in? I don't understand. Not saying it's bad to like him, I mean I like Sonic, but I just don't get Ness. He's something I can't wrap my head around.

/

Is kinda similar to Ness design-wise, except to a greater extent. Their physical appearance is just... Hideous. I don't like it. Yes, I main a anthropomorphic blue hedgehog who can talk and has to go fast... But that's more of a nostalgic thing for me. I like the style of his games. As for gameplay... I hate the micromanagement system linked to the Pikmin. Paired with the very campy style, it just doesn't fit my style. I want to run up to you and hit you in the face with my fist, not throw some multicoloured plants at you from a distance. I prefer a more rush-down style of play. Olimar doesn't fit this. But despite that, there are characters who aren't a rushdown kind of character, but I can use them just fine. But Olimar eludes me.
OH...

. I like him, I want to like using him... But he's SO weird, I've tried a few times but I can't use him. XD