I actually like Media Molecule more than (current) Naughty Dog myself. No disrespect to ND, they make great games and I like Uncharted. But they mainly just make what's popular in gaming, which would be the cinematic stuff these days. Mm on the other hand has made some truly unique games. Also, I'm not a fan of gory, grimdark series like The Last of Us. It's the main reason I never really gave Attack on Titan a chance last year. Though so far, that series thankfully doesn't seem to take itself extremely seriously like I thought it did. But I digress...
Even though I prefer Mm, I think it's pretty easy to see why they're not as beloved as ND. FIrst off, they're games are "kiddy" in appearance. There are some notable exceptions, but generally games aimed at kids don't get as much love and acclaim as something more serious like Uncharted or TLoU. Also, ND has been around a lot longer than Mm, and thus has the advantage of being more cherished due to being a part of people's younger days or childhood. Then there's the fact that Mm's latest game is on the Vita and didn't sell that well. Finally, there's the whole "floaty" complaint with their iconic franchise LittleBigPlanet. It's a vocal minority thing and all, but it's still a detraction.
It would be nice if Mm received as much love as ND, but oh well. They still get plenty of critical and commerical attention, and don't seem to be in danger of going under like Liverpool or anything. That's good enough for me.
Really hope their PS4 game is unveiled at E3....and that Move won't be an absolute requirement.