Heres my experience over the years:

ON Gold Standard Whey - watery. But tats how i like it.

ON Nitrocore24 - thick, since its a combo protein formula.

Gaspari MyoFusion - thickest combo, like milkshake. I think the probiotics gave me some runs.

BSN Syntha-6 - a watery combo. Great taste. I like this.

Nutrabolics Isobolic - sweet combo. Cant remember anything good/bad about it.

MHP Probolic-SR - worst tasting combo. yuck.

RonnieC Pro-Antium - ok combo. Got little bits of wafer/cookie in it.

Nutrabolics Mass Fusion - thick gainer, super sweet.

Elite Mass Muscle Gainer - another thick n super sweet gainer.

Dymatize Elite Whey - similar to ON GSW, but very sweet.

Dymatize Elite Mass - a watery gainer, almost tasteless compared to others. I like this.

Happy chugging