I guess 36, if you count Hong Kong separately. Include Canada (lived in Canada since 1969, photos in 7 Provinces), USA (38 States), Bahamas, Dominican Republic, St. Helena. Then 13 in Europe (lived UK till 1946), 14 in Africa (lived in Kenya over 20 years), 4 in Asia - Yemen, China (inc HK), Japan. Really, this is cheating some, 'cos some of these (e.g. Libya, Japan) represent only "passing-through" ports or airports, other overnighters with a tourist trip thrown in (e.g. St Helena, Yemen, Egypt). But I DID take photos every place, some reasonably successfully from the air
Mostly wildlife, landscapes and urban scenes. Cameras from Brownie Box (1946), Ensign (Ful View), other Kodaks, Braun Paxette (1st 35mm 1954), Pentax, Rollieflex, Minolta, Nikon Coolpix (first digicam) and now I'm using Lumix G2. Also feet of 8mm (Bell & Howell), Super 8 (don't remember which), Sony handicam, and 16mm (Bolex).
Not too much serious stuff (lack the patience) - mainly amateur travel snaps and family. Most of collection in disarray, only partly digitised and catalogued (do it periodically, as the mood takes me, but I enjoy the recall and memories when I get down to it). I throw away the really bad stuff as I go, but even then it's sometimes hard to part!