It's Eugene for me. Well, Eugene is big guy and the only big guy in all my drawings. So it is very hard to draw him the same every time, it is hard to balance his face for it not to look too childish (because he is older than main heroes and just shouldn't look like big kewpie) and come on how do one draw the shorts on him, I don't know even after 20 times! 
Man I have problems making certain angles look like how my characters look from the front, of that makes sense? The struggle is real.
All the time. I have a couple of characters coming up soon who are supposed to be ridiculously attractive but I can’t seem to get them to look right.
The weird part is I can make fanart of one of my fave characters and make him look ridiculously attractive and downright sexy - but when I try to have my own characters like that they just look off. Which is weird to me. Like I just wanna have a guy look masculine and give him long eyelashes and have some sensuality about him.
I think it’s mostly the hair. I always picture my male OCs with short hair but I’m so much better with long hair. Also the fanart I like to draw is of a character with long hair.
Then of course there are certain angles. I have to avoid drawing Priscilla and Cassandra facing the camera because of their noses. They’re exaggeratedly pointy like beak noses so drawing them while they face the camera looks awkward. I have a similar problem with Roxanne, who has more of a hook nose. With Hazel and Annika, well to be blunt I have a hard time drawing noses for black characters while avoiding making it look like a caricature. I ended up going with a buttonish type nose as seen in Steven Universe for characters like Garnet and Amethyst. The hardest part there is that I actually gave them slightly different details on their noses but I can never seem to remember which is which.
Then of course Hazel... Hazel is constantly frustrating because she’s comprised of everything I’m least familiar with drawing: black characters (well she’s mixed but still), curly hair (Afro-like in her case), cheerful, a child, and I actually had to drastically alter her outfits because I wanted her in a more Lolita type outfit but I’m terrible at drawing it. Also I do everything possible to avoid drawing both her eyes. For some reason she looks kind of uncanny to me when I do. When I draw her it’s like I have to pay attention to anatomy since I can’t cover my mistakes with large boobs like I constantly do with Roxanne.
That said drawing smaller boobs is hard for me and I always seem to end up making them bigger than I intend them to be.
This guy, Rod, is and will always be my answer, for this one-shot anyways xD
Having to draw him over and over and over has taught me a lot about things to consider when designing characters in the future 
First off his outfit is full of details that take a lot of time to render, so any panel he appears in typically takes at least twice as long to draw at every phase (pencil, ink, and color)
And the other thing is his hair: when I was designing it, it was A.) more simple (it developed complexity as the pages went along) and B.) I was mostly designing from the 3/4 view. I figured out how to draw it well in the profile view too, but just recently I realized I had no idea how to draw it from the front lmao. Some examples are:
As you can see, I was mostly just cheating and kind of drawing it the same as 3/4 more or less. In a recent page I tried drawing it truly from the front, and idk how I feel about it yet xD
(I think it actually looks pretty okay, but it took until page 35 for me to even try it )
Honestly its PERSONAL struggle every day remaining consistent. I usually have the most time with "Lyosha". and every once in a while Saveli or Braylin. but I enjoy drawing Braylin the most. lol he's cute and chubby. with all that being said. I'm not quite sure about his personality. he's pissing ppl off right now. haha!
I have difficulties drawing all my characters consistently. They always look slightly, or even quite, different. But I'm not too worried because I'm a beginner and I can see things are slowly improving.
But I have one character that I have a lot of difficulties to draw, and I'm more worried, because I had problems since the beginning. The character design has been long and challenging and I've never been fully happy with it. As a result, I'm not good at all at drawing him. He can have relatively strong masculine features in one panel and look like a girl in the next one. He also look the oldest in most panels of a flashback.. several years earlier than the main story.. Arghh! I finally decided to draw him as blandly as possible to reduce the opportunities of screwing up.
I hope one day I'll draw him better and in a way that fits his personality.
This one here, bland version:
Japhin has always been the hardest to draw which is ironic given his mother was the easiest. 
I think its cause he's the only character with a human face. Everyone else looks cartoony or a muppet
yeah... I even sometimes think that I don't draw my characters looking "themselves" enough. I don't know if that makes sense or not
Yes like all the time. I'm thinking about buying another sketch book for just drawing characters. Argh ....
I hate drawing but I love it too.
I struggle to draw my main characters when my standards for my art work are raised by myself. This usually makes me work on drawing and coloring the characters until some improvement is achieved.
Despite the designs being quite simple I still struggle with drawing the two main girls in my comic so they look consistent enough (or maybe I'm being too perfectionistic)
Charli is usually the hardest one (pictured) since I want her eyes to be a bit slimmer and more "square" compared to the other girl (Hana's) round cutesy eyes.
The other day I had to redraw the same panel 3 times because it didn't look enough like her..... rip..
