Eyebrows, they're so hot right now.
I have always had rather substantial eyebrows (as demonstrated in the above creepy, unblinking photo I've so kindly provided you with) so the fact that big brows are 'in' right now suits me down to the ground. I have always been contented with using MAC eyeshadow in Brun (£12 here if you're interested) to fill in my brows but one day I decided I needed a change.
Side note: I didn't start filling in my brows up until about 2 and a half years ago. I know, it makes for some gruesome nostalgic photo viewing!
I picked up Make Up For Ever Aqua Brow (£16.50 here) when I was in Prague last year because I had seen a few people rave about it. Ever the sheep, I did a little bit of research and decided that this was to be top of my beauty buys list. I got it in the shade 30 Dark Brown which is a good match for my dark hair, however it does come in 7 colours in total so there is most likely a fit for everyone.
Now, this does take some getting used to. If you're just starting to fill in your brows then I'd honestly stay away from this for a while, it doesn't take much to get it rather wrong. By wrong I mean Scouse Brow wrong. If you use too much product or get a bit heavy handed you will find yourself with big block eyebrows. Trust me, I learnt this the hard way. Once you get the hang of it (and discover that you need the tiniest amount of product) then it can be used to create a really natural look. It also lasts all night loooooooooooong (all night) and I find it easiest to remove with an oil based eye makeup remover. I don't really have a brush preference with this product, whichever angled brush is closest to hand. I ain't fussy, man.
Final thoughts? I love this stuff. It's your best friend once you get to know it a bit better and you're getting seriously good bang for your buck. £16.50 for 7ml may sound like a lot but I don't see this running out for at least another year - 18 months. Shhhhhhh, don't tell the makeup 'use by' date police...