I love Boohoo! I know people have had issues with them, but from personal experience I can't fault them. I get quite a few things from there because the quality is generally pretty good and the prices are reasonable.
I also shop at New Look, Primark, Missguided, River Island and sometimes Top Shop if I can afford it (after a generous pay day or a few weeks where I've saved a decent amount from my wages).
I get bits and bobs from other shops too, but I typically shop at those stores.
Oh and I may have bought a few items of clothing from eBay - new of course but you can't half find some good bargains on there! I bought a faux leather skirt for about a fiver!!