Should I switch from canon apsc to m 4/3rds or mirrorless?

Four years ago, I bought a GF 1 because I just did not enjoy carrying my 40D and several lenses on trips.  I never usesd the Canon again.  I gave it to my daughter and her husband.  Since then, I have had heart surgery and now have more energy than I have had for twenty years.  I celebrated by buying the GX 1 and giving my grandson the GF 1.  I have never enjoyed photography more.  Next week, my wife and I are going to the National Bridge tournament in San Francisco.  I am looking forward to putting the GX1 on the BlackRapid Cargo sling strap with an extra battery and SDH card.  This kind of photography is just pure fun.  I can only hope that you will enjoy m4/3rds as much as I have.

Hal