Brussels from my point of view
Charming little city though it was probably one of the more dirty cities that I visited. Interesting contrast in states of repair of buildings (quite common to have a really run down place right next to an 'attraction' eg. the grand palace)
Insider Tip:Fairly small city. No need to spend more than 3 days here when on holiday unless you have specific locations in mind. Tram/Underground rail system a little confusing at first (uses basically the same lines/stations through the city centre) though given it only takes 40 minutes to walk from 1 end of the city centre to the other, it isn't really necessary. I only used the trams to go to the atomium (30 minute trip). Public toilets are NOT free (between 50 eurocents and 1 euro to use).