I'm a total cosmetics junkie, and have filled both our bathrooms with my stuff, even have 3 makeupbags
Everyday:
I tend to use foundation (Rimmel), powder (Rimmel) and bronzer (Maybelline) everyday because my skin is very pale and a bit uneven coloured. My eyelashes are naturally black so I'm not too fussed about mascara, now I'm roadtesting L'oreal telescopic mascara which is ok, I like the slim rubber brush. And I think Benefit Brow Zings eyebrow colour is very very good, looks very natural.
I don't always wear eyeshadow, but if I do, it's beige or brown, safe bets...
Lipgloss is more my thing, makes me feel girly
Lotions and potions:
I'm really into body lotions and perfumes, and now in my newest attack against the enemy, cellulite

, I got a pair of exfoliating mitts that you use in the shower. Totally love all things Body Shop, except their makeup, it just slides off my skin, but their body washes and creams are heavenly! Ooh and Johnson's face wash and moisturizer are excellent and so cheap!
Hair stuff:
Anything goes, at the moment I'm liking L'oreal royal jelly shampoo&conditioner, makes my fine hair really soft. My partner and I both have long hair so we just buy whatever is on 2 for 1, and I haven't noticed much difference in brands. I wouldn't trade my Isinis hair brush for anything else though.