Probably about 25%. Yes I've been with Pokémon since Gen 1, and I'm well aware their designs weren't perfect either, but I'm so sick of GameFreak doing the whole 'let's take this object, and put eyes on it!' thing. Vanillish, Honedge, Cofagrigus, etc. They're just an ice cream, a sword and an Egyptian coffin with eyes stuck on them. Klefki is the worst of all. They took some damn car keys and gave it eyes, then pronounced it a Pokémon. Most of the fakémon these days are far better than any of the designs GF are coming up with.
I'd say, this gen, the only designs I TRULY liked are: Yveltal, Xerneas, Zygarde, Braixen, Aurorus, Tyrantrum, Vivillon, Heliolisk, Trevenant.
The level of detail you see on the legendaries (& possibly Tyrantrum) this gen? THAT is how detailed ALL designs should be.
I mean I like Litleo/Pyroar, but Litleo is just a Shinx knock-off and Pyroar is a lion. Nothing different about it. Just. A lion. No cool design, no epic colour scheme, no intricate details. A lion. Same for Pancham/Pangoro. They're normal pandas. With a leaf and a cape respectively. Don't go bringing up all that 'gen 1 was just a pile of sludge (Muk), Krabby and a Seel!' crap, I already said I know Gen 1 wasn't perfect, but GF are slipping with their ideas now.
& Then Talonflame... oh God. I hate it more than Klefki. Far more. The Pokémon itself isn't the problem, I actually like its typing and its pre-evo (Fletchinder). It's the name. It's abhorrent. They literally took 2 English words and stuck them together. They don't even flow (like Volt + Orb does). It sounds ridiculous. Even some variation of the word 'bird' would have been better.
*deep breath*
Basically, they gave us barely any new Pokémon as it is. The least they could have done was make them half-decent. The random handful of Megas that are literally only distributed to Pokémon which are 'fan favourites' and have no other pattern to them... they do not make up for it in the slightest.
They've even started adding objects to Pokémon now, just because they can't think of how to improve the ACTUAL Pokémon design (see Flabébé, or the Conkeldurr evoline from last gen). It's ridiculous. & Don't even get me started on Swirlix/Slurpuff.