I regularly use quite a hodge podge of different products. There's no way I could live with just one line of products, although the most well-rounded company I regularly employ on my car is Poorboys, so I voted there, although Zaino is still my favorite sealant.
Clay- usually just use
Clay Magic
Wash -
NXT, but also like TOL, Z7, SS&S,
Pinnacle and QEW
Waterless wash - S&W
Polish - PB's SSR's, and
AIO for carnauba prep
Glaze - VM/RMG
Sealant - Z2, also like WG, UPP, EX-P
Wax -
Souveran, Natty's Blue, S100, CMW
QD - Adam's, with QS a close second
wheel cleaner - P21S gel
MF's - Pakshak
tire dressing - Zaino (forget the number)
trim - Adam's VRT
glass- IG