I personally think Gym Leaders are getting more creative. Their designs are getting more unique and they now have hobbies/jobs that relate somewhat to their type of preference. It makes them more memorable.
Basically, they feel more like actual characters instead of human obstacles like in the early gens.
And I like all 3 of them. --- This is an original signature. Do not steal.
Blond kid has a pretty wacky design but I like it. I wish he is an early steel gym leader but it looks like he's probably electric type.
I'm not too crazy about the probable rock type gym leader. I'm honestly having a hard time figuring out if it is a guy or a girl too. --- College takes away all of your time to play videogames :'( Official Archer dude of the Agito XIII Board