Oh damn. I thought it was pure french. I'm fluent in english and french, but not in german and definetly not in dutch.
You can live in the French-speaking territories with no problem at all then. I lived in Brussels for 6 months and I live every day of them, but whoever told you the climate is better than that of Sweden? A few degrees warmer counts for nothing, not to mention the grey, wet autumn. I think Belgium has most amongst all other European countries.
So let's go into details now, living in Brussels is cool because of the city itself, where it can be as calm as it can get or as extravagant as it gets; it all depends on the person.
You basically live in the center and you can reach man countries in a matter of 2~3 hours for cheap.
Brussels most famous university is ULB (Universite Libre de Bruxelles), then there is a couple of others as well, one of them is for Flemish speaking students.
I won't mention the chocolate, the beer, the fries and the waffles because they have already been mentioned.