I heard this thing a lot:
„If you’ll go to country X and try to tell jokes, people will not laugh at your jokes.”.
As far as I travelled, I found that, while it’s true to some degree that people in some countries (or, perhaps, people speaking certain languages) have different humor levels, I think that you can find individuals that laugh a lot and individuals that don’t tell a lot of jokes wherever you could go.
I think what’s specific to humor in Romania is, at some point, the humor called „caterincă”. This implies, as I see it, making things so funny that you laugh about everything, nothing is off-limits.
All-in-all, I think you can find people with whom to have fun everywhere you would go. Also, you can find people who look at life in a much more serious way. (that is, if you consider humor as not being serious)