They are Mattel as they have the exclusive contract as of right now.
Mostly I collect 1:64 scale since they store a lot easier, but lately I have been getting more into 1:18 for the detail. Most of the ones I have right now are Mattel, but I do have Maisto, Bburago, Ertl, and 1 AutoArt. Exoto will be added as money allows. I absolutely love the detail on those.
In total I have almost 2000 1:64 scale cars, and about 60 1:18 scale cars.
I am selling almost all of my 1:64 to pay for the 1:18 though. They get expensive quick!
Thanks for the compliment on the location choice! It is actually my driveway looking down the hill.