Good-Great WP7 Apps?

I am in love with Metro, and the Lumia 800 is a gorgeous device that perfectly blends in with it.

I'm considering importing one from the UK but the only thing holding me back from buying it is apps. I can think of tons of apps right off my head that I'd use if I bought a 4S but I don't know any I'd use if I bought a Lumia 800.

Recommendations?