I have always been a bit reluctant to spend a lot of money on nail polishes but after years of having cheap nail polishes that chip within a day - I have come to realise that it makes sense to buy quality nail polishes.
The best nail polish really has to be OPI's range. It applies really easily - not too thick so that it clumps but not too thin that it is streaky. They have a huge range of colours and I love the cool names they have for them (my current favourite is 'Go With The Lava Flow').
This is my go to nail polish, its so good lasts the longest out of any nail polish i've used. I tend to use my hands alot and it gets so annoying when polishes chip easily, It applys so nicely doesnt clump or go streaky its a very good brand