Mario characters that you had good opinions of but they have gotten worse.

Dr. Peach

Rest in Peace Walkazo 1991-2016
Banned User
This thread is about the Mario characters that you used to have good opinions of/used to like a little bit, but then they have gotten worse (or deteriorated/degraded) over the years to the point of not liking them that much anymore.

I used to have a good opinion of Bowser, but then my opinion of him has gotten terrible after Super Mario Odyssey, mostly because of the ending.
 
Rosalina. I enjoyed her presence in Galaxy 1 and Mario Kart Wii, but after that, I kind of got tired of her. The change in voice actress really didn't help. The actress in the two games I mentioned was perfect. It personified Rosalina perfectly. I feel the new voice actress ruined that.
 
I've come to realize over the years the amount of Mario characters I actually give a shit about you could probably count on both hands.

The rest I either tolerate, dislike, completely forget exist or am indifferent to.
 
I think I actually used to like Daisy...not entirely sure what made me stop liking her, but I believe it had something to do with Waluigi. The way Daisy treats Waluigi is just evil, and not the good kind.
 
I guess maybe Waluigi?

I mean I don't particularly dislike him nowadays, but back in the day he was probably one of my mains in spin-offs. I guess I just had a huge drop of interest in him, especially after the whole "Waluigi insubordination" after E3.

On the other hand, Daisy I started having better regards towards
 
I can't say I've ever grown to really dislike a Mario character overtime, but it is true that I don't like Yoshi as much as I used to. I still like him, he's just gone way down my favorites list.
 
Yoshi, I used to like him well into the GCN days. I remember how much I loved the light blue color of Yoshi and really wanted a toy for it. I just remembered how cool he was when he could change color in Mario Power Tennis. I used to want to pick him in Mario Party 4 because, at the time, I just was hesitant to use Mario probably to avoid the pain of seeing him hurt (I think). I did remember enjoying using him in Mario Kart Double Dash, his punching is him licking people. He also had the egg item, which I remember using to get some nice stars when I was in first.

But now I abhor him because he started being a pain in the ass to fight, starting in Mario Power Tennis. Today, I just can't stand him any more. He's annoying as ever, like in Smash Bros. where he just doesn't shut up, with his squealing quality in Mario Kart 8 and Super Mario Odyssey (he's absolutely the worst in Super Mario Galaxy 2), and his design just looks stupid. I still really like the old dinosaur version and prefer to think of that version as a separate character, but I play along when people expect me to deride and mock the older Yoshi...
 
I don't think it's possible for my opinion to diminish on a Mario character, worst case scenario if they do something that is particularly out of character or annoying I'll usually just treat it as a isolated incident and not let it effect my general opinion on that specific character.