I don't think I can pick just one brand to be honest. I vary between high end and expensive brand with everything.
For example my 'everyday' make up at the moment is:
Concealer - Boots Collection
Foundation - Primark Stay Matte - absolutely brilliant for a fiver. Supposed to be a dupe of Estee Lauder Double Wear and having used both I can honestly say it comes pretty close for about 1/6 of the price. I like Mac Studio Fix too.
Mascara - currently using one of the Essence ones from Wilkos. It's about £3. I like Benefit BadGal Bang too, but it's about £25 I think now, and cheap or expensive, all mascaras dry out after a few months. Same with nail polishes, cheap or expensive they all chip.
Eyeliner - Lancome, and this is one high end product that I definitely won't budge on. It's expensive but is quite a long pencil so it's lasts ages and it's the only one that stays on me for most of the day. I think cheaper eyeliners just don't have the same staying power. Am open to suggestions though!
Brow pencil - whatever is on offer. Currently using a Rimmel one and they do a good brow mascara too for around a fiver.
Blusher - I'm struggling with this at the moment. I don't like powder blusher, just cream but everytime I find a nice one it gets discontinued. Currently using a No 7 one, but that HAS been discontinued so don't know what I'll use next.
Lipstick - anything and everything. High end Louboutin to cheap and cheerful Primark. Current lipliner is Primark too.
I'd say if you don't want to spend too much at first if you're not quite sure about what you want then buy the high street version. You can always go for a more expensive option later. I wear red lipstick all the time now but when I started wearing it first I was a bit nervous about wearing it (thanks to a bitchy remark from my mother

) so I just bought a cheapy one from Boots. I think it was Boots 17 at the time and played around with the cheaper ones before splashing out on a more expensive one.
The only bad experience I've had with high end products has been with Charlotte Tilbury. Their foundation was absolutely terrible and the eyeshadow quad broke the first time I went to use it. I returned both products. Oddly enough the same thing happened to my friend with the eyeshadow quad but that was about a year later so I doubt they were just from the same 'bad batch'. Put me off buying CT again.
Don't discount the cheaper options either. Some of the stuff is quite good. Essence in Wilkos (and I've seen it in a few pharmacys too) is quite good. The nail polishes especially. I like the consistency and coverage of their foundation but I find even the lightest shade to be that bit orange. Then again I'm quite pale skinned so that might just be me. The mascara is good too and the lipliners.
Primark have some great own brand stuff. The foundation that I mentioned and their lipsticks are absolutely excellent for between £1-£1.50.