I am a huge Basic Grey fan - they were one of the first designer paper brands I came across, and I still use their papers all the time.
I love the look of their new collections Oliver and Olivia - gorgeous papers.
Unfornately as they are based in the US, it takes a while for their new collections to appear over here - but I will be on the look-out.
Another recent collection (that is available here) is their Basics range - I especially like these manilla papers.
So versatile and quirky - perfect for all kinds of paper projects.