I'm leaning towards Scorbunny. I'm usually on team Grass, but Grookey and Sobble don't feel as distinct as previous starters, and I like Scorbunny's markings; the bandage on its nose is a nice touch. It's to bad it'll almost certainly be another physical attacker, but at least there's hope for it not turning into another Fire/Fighting type.
Grookey is my second favorite; it's definitely a better grass monkey than Pansage. I like Grookey's colors and the stick in its hair. Sobble just doesn't really stand out to me, but I don't dislike it. My opinions on the starters will definitely change when we see their evolutions, but as of right now, I feel like these are little underwhelming compared to their predecessors. The starters from Kalos and Alola all looked very different from each other, whereas Grookey and Sobble have about the same body shape as I said earlier, and while Scorbunny is more unique, I wouldn't say it's particularly outstanding either. But again, these are just early impressions.
The game's visuals are really good; I love how vivid everything looks. The Galar region looks cool, albeit not particularly exotic. The more industrialized areas are a nice change of pace after Alola, though. Gyms are apparently returning, which I'm on board with; the trials in Sun and Moon were neat, but I found them to be a little less satisfying than the gyms. The only really disappointing thing in the trailer (in my opinion) is the return of random encounters, instead of Pokémon being visible in the world like in Let's Go. I understand that they want the element of surprise in finding wild Pokémon, but I don't think it's worth it, because it can make finding a specific one a pain in the a**.
Overall, I'd say Sword and Shield looks really good so far. I voiced my concerns for it in another thread, but even if it doesn't meet those expectations- which it probably won't, at least not in the way I think it should -it'll probably still be fun, which is what's most important.
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They say perfection is the ultimate imperfection. Or maybe that's just what I say.