Making a OC, give me feedback

Just working on some new ideas for a OC, middle one is made of multiply different images that I drew by hand, so sort of my first true OC, the other two (attempt 2-3) are made using drawing tutorials but still hand drawn with no tracing, tell me what you think and what I could improve on

(1 is made of like 5 different images about different body/wing/mane/tail/horn types,)

(2 is a version of twilight that I stoped doing before adding cutie mark and colour and other details so I could add some personal flare (none added yet))

(3 is Luna with no cutie mark)

(4 is another OC I created while waiting for google photos to install, it is disappointed in me that I created the twilight character)

(Link 2 photo, had to put on devinart cause I couldn’t with google/apple photos)

(Colour will come soon)

https://www.deviantart.com/averagenzbrony/art/Bfef7ea2-619b-46a7-9a13-099b33b7f151-982675812