1. Dutch - Native
2. English - I am being told I speak a posh kind of archaic English. Seems to impress people so I never got rid of my accent I got from living in London.
3. German - There are 17 million dutch people and 90 million Germans. Oh yeah. They invaded us once. There is no way to get around German. My n900 refuses though. Germans tend to love the accent of Dutch people. I hate it and try to improve all the time but will probably always be recognized instantly (go figure) as a Käsekopf.
4. Spanish - I live in Spain. I work there. My girlfriend is from here too. I feel I speak non of my languages good enough. Spanish is relatively new. Four years don´t hide a guiri...
5. Catalan - The region where I live has a different primary language called Catalan. Without it, life is very much more difficult. I understand it a whole lot better than I speak it as the pronounciation is not easy to grasp.But even speaking it with a thick, thick accent opens a lot of doors and gains a lot of positive reactions as most extranjeros simply refuse to bother.

@OP

90% understanding, huh? Makes me wonder... What measurements do you use?