I really do love colour! The problem is that I keep spotting other pretty colour combinations as I'm making my hexagons - it's difficult to stick to my original plan!
I'm using 2 cost effective, let's say, yarns for these - Robin DK and Hayfield Bonus DK. Despite negligible cost difference, the Hayfield is so much nicer to work with. I've seen a few people mention Stylecraft yarn too - I think I will have to give that one a go too with a future project.