1, and sort of 4 (I've not curated any exhibits, if that's what you mean.)
I have a PPL, have flown mostly 172s but also 152s, Archer, DA-20 Katana, and a Schweizer 300.
And I like air museums - I've been to an Air&Space in Seattle and LA. I've been to Chino a couple of times (and I'm going to see their Zero fly on Dec.4th Yay!!

) and Edwards AFB, and finally, one of my all time favorites, the Zhuliany air museum in Kiev, Ukraine. I don't know if it counts, but I've also had the pleasure of riding in a B-17, EAA's "Aluminum Overcast".
Excuse me while I spam you all...
Hello, Halo (largest Heli in the world still flying

)
Not in Zhuliany, but they actually let me and my sister sit in a real Voskhod capsule (Either that, or they replicated the burnt ceramic exterior really well.)
Wreck of an Il-2 at the Great Patriotic War Museum in Kiev
Noob plane