MAC, Dior, and Urban Decay =)

Dior, YSL, and Paul & Joe (for lip sticks and glosses)

Everyday minerals, bare minerals, some pur minerals.

Dior is my favourite and yes,I am loyal to this brand though I've tried a lot!

MAC & Clinique (solely for my foundation & daily face care) but i've recently strayed to NARS, LORAC, Urban Decay, & Makeup Forever

Chanel, LORAC and Giorgio Armani (the Face Fabric Radiance foundation is nothing short of amazing!)

I mostly use Maybelline + MAC, but no, I'm not loyal. If something works on me, it works, regardless of the brand.

Not loyal at all but MAC probably has the highest count in my stash. Nars has the second highest count.

So far... My favorite higher-end makeup brands are Smashbox, Urban Decay and Kat Von D.
I have a feeling that all those gorgeous shades that Make-Up Forever has would fall into my favorites category too, if I had any...
As far as drugstore/other brands go I really like Physician's Formula and some Ulta cosmetics. I can't live without my Ulta bronzing powder!
Loyalty, though? I dunno. If the quality ever went downhill on the things that I like I'm sure I would switch. As much as I like nice packaging and brand names it's most important to me that they do their job well.
I'm always interested in trying out new brands and products, you never know what's out there until you try.

My favorites are MAC, NARS, and MUFE. I also really like UD, and Benefit!

Some of my favs include Bobbi Brown, MAC, Smashbox, & NARS. I am not loyal, I use what works for me & some brands have colors that others dont :-)

My main brands are Dior, Stila, YSL, and NYX. I'll occasionally have affairs with Urban Decay and Chanel however Outside of those though, no, I don't jump around

Skincare, foundation, powder - Estee Lauder
concealer - Lancome
blush, lipstick, eyeliner - Revlon
mascara - Maybelline or Cover Girl
gloss - I have too many to name the brands!

I am loyal to these since it has taken me a while to find what works for me.

I will only ue Korres Skincare for starters!
Makeup wise, I am loyal to:
Shu Uemura, KATE, Chantecaille, Le Metier de Beaute & Max Factor!
MAC was on there, but I've struck it out of my life :P

Estee lauder
MAC
Dior