Oh wow, this is gonna get into a weird zone.
I used to work for a Mary Kay lady in HS(if you are not in the US, or just don't know,
Mary Kay) so I ended up with a LOT of their brand makeup. I rarely wore any of it, and it just migrated with me through life. I'd put some on for interviews or to go out on the town, but mostly it just existed.
Then I got into costuming hard core. I now have stage makeup and daily makeup and pretty much everything under the sun! But now I mostly wear it when I'm in costume, though still for interviews and the occasional night out.
Some things I usually tell people who are looking into makeups. Take allergies into consideration. If you're allergic to bees specifically read ingredients on mascaras and lipsticks, they can contain beeswax which can trigger some allergens.
As to brands. Obviously Mary Kay, Ben Nye, MAC and Krylon. That being said, I look less at brands and more at 'is this a colour I want/need?' Outside of my serious stage makeups I don't care if it's a $5 pallet or a $50 if it has what I need.
As to perfumes, I don't know if they even make it still, but I used to be obsessed with Aqua di Gio by Georgio Armani...loooooooooove that stuff, but so expensive!