Have thought about this a little, so will expand my answer a little.
Ive driven in (no particular order), france, belgium, netherlands, luxembourg, germany, lichtensteien, denmark, sweden, austria, switzerland and italy. also monaco and monte darlo if you class them seperately
Ive also travelled to hungary, but as a passenger not driver.
Ive worked in france, germany, belgium, switzerland, austria, italy, and very briefly in denmark
Ive used trains in belguim, denmark, sweden, hungary.
Ive walked over 4 borders.
Oh, and ive biked in belguim, netherlands, germany and denmark
By driving i dont mean 10 miles (figuratively speaking ), in a hire car, but hunderds in some and thousands in others.
Plus wales and scotland and england by the way
And i speak a little german and french, but no way am i fully competent
This should prove ive been in europe a lot, not just on me jolly hols