*Please note, I'm by no means a conformation expert. Elana's going to come up and prove me wrong on everything, just you wait. :P
1 is not proportionate at all. Ewe-necked and a small head. Not a looker and has a HUGE barrel. IMO, really heavy on front. She looks pieced together from different horses.
2 is the best one, Impo. She's proportional, well-muscled, beautiful head. However, she might be a tiny bit sickle hocked? Tiny bit downhill, also.
3 is alright. Downhill, under-muscled neck, and there's something about her front legs I do not like.
4 is a close second. Teeny bit downhill, she's got under-muscled hindquarters compared to number 1. Thin neck, small head.
All horses are beautiful, but some are more beautiful than others.