Recently entered a couple of designs on Natwest Adapt (create your own personalised, unique debit card) and one of them is now in the top 10 designs.
I think they are quite a nice designs and more professional than most of the others I have seen, although there are some really nice designs on the site to choose from.
Natwest have made a good move doing this I think, these days people want to be able to personalise their worldly goods and what better than something that usually looks so corporate and that you, more than likely, use a couple of times of day on average – your credit card.
Here are my designs and a link if you want to get one for yourself (Natwest have sent me an Amazon voucher for getting the bottom design ranked No. 1 for a whole month).