@Terry
Don't know about the rest of Europe, but indeed tipping wasn't a thing in Romania. But I think that's only because of how communism worked. If you accepted tips in your job, you were frowned upon by the state, best case scenario. Worst case, the police would come for your ass.
Now tipping is pretty common, but I doubt the average Romanian tips as much as you guys do.
@Terry
I generally aim for 10%, but go for whatever rounded up number I can get, which sometimes can come under 10%.