Sega and Konami might once be great developers, but I don't care to much for them nowadays. Platinum is pretty solid they worked on Nier Automata, W101 and the Bayonetta this gen, which are all very good games.

Yeah, I really liked Grid 1. Grid 2 was sort of disappointing, but have you played grid autosport? I thought that was great too.

And about the bolded, I'm curious as to why. I personally liked it, despite the toning down of the arcadyness. The one that disappointing me was dirt rally (no reason to take the series into full simullation, we already have WRC for that)

Sega has made far more great games than I can count or keep track of. Konami would have gotten my vote on most other lists, but Sega has just made so much from all the great Genesis games (Sonic, Shining Force, Phantasy Star, Flicky), to great arcade games (Golden Axe, Altered Beast), to great modern games (Puyo Puyo Tetris, Valkyria Chronicles) etc.... So many great Sega games I can't even list them all.

Now I would probably rate Platinum games third. They are good, but the fact that they now have more votes than Sega shows how biased the voting is toward the recent batch of games. They just haven't been around that long.