I recently rode from Frankfurt to Sarajevo, Bosnia, via France, Italy, Slovenia and Croatia. The reflective jacket requirement for France as well as the requirement to carry your own breathalyzer equipment was repealed. Yes some places require the first aid kit and the spare bulbs, but since I was never stopped expect in Bosnia, which did not ask or check, I'm not sure how "strict" they are about having them or not.
In the last 2.5 years I've ridden in Germany, France, Switzerland, Slovakia, Croatia, Bosnia, The Netherlands, Austria, Hungry, Slovenia and Belgium. The only place I have been stopped is here in Bosnia, 3 times in one day in fact.
I was taking a nice ride around southern Bosnia on Memorial Day. The first cop saw my German plates and just waved me on, the second was 2 cops that just wanted to look at the bike, the third actually asked for my papers, but all was in order and no problems. In fact he probably couldn't even read them since they are in German, but he did his due diligence.
Europe so far has indicated that both the police and the average driver gives much more consideration to people riding motorcycles than in the U.S.. When they see that you are trying to pass, most move to the right and give you extra room to pass. Especially here in Bosnia where 90+% of the roads are twisty mountain roads.
So, as stated before, it is their countries and I willingly adhere to their rules, just as we expect visitors to the U.S. to abide by ours.