Why ouch? I feel like that's enough for the moment.
It's not that great when you don't speak any French though, and look kinda not white- which you do. They have some issues with their dark skinned population, cuz poor and criminal. But as you are only a tourist foreigner not a local it might be different.
And I agree with you, that you get more out of it, if you concentrate on one city and for instance spend more time in Paris, than you'd tour through Toulouse, Lyon, Marseille, whatsoever. There's a hell lot to do and see in Paris, lot of sights, culture and all kinds of entertainment for body and soul.
I mean, I also have made some tours on which you like hop through cities, just so you can make a check on your personal list, like been there, but seriously, what can you see, do and experience in two days in a world city like that. Not much I would say.