The Yankee trays I have are hard plastic and come in various colors including black, yellow, red and white. I like them best for film development with a slosher.

For paper, I prefer Patterson trays which have recessed grooves on the bottom which help with agitating and picking up prints from the tray. They also have a pouring spout on one corner. I like the 14x17 size for 8x10 and 11x14 paper. Works good with 2000 ml of solution.

For larger trays for 16x20 and 20x24, I use the Cesco trays.

I agree that the glossy surfaces are good for trays. No matter which brand, keep them clean.