Yep, I think I will have to learn to use the M differently to the way I use my Canon DSLRs. Shame though because I like pretty much everything else about the M.
I've tried a few similar cameras (small body, large sensor, reasonable price for body and fast prime lens) in the last 3 or 4 years:
Sony NEX F3 - Body is great, but prime lenses not good enough (either too slow or poor IQ or huge or v expensive)
Panasonic GF1 - Excellent body. Excellent 20mm. But image quality not up to todays standards and lens more expensive.
Fuji X100 - Very cool, but lens quite soft wide open close up (+ 2 or 7 other annoying quirks!)
Samsung NX10 - Superb, sharp, cheap 30mm. High ISO IQ not that great.
Samsung NX1000 - That superb 30mm lens again. Saving a RAW image was painfully slow and the IQ not amazing. I nearly stuck with this, just because the Samsung NX 30mm lens is so good.
Sony RX100 - Small(er) sensor. Not bad, but not really want I was looking for.
Then a few weeks ago I saw an M for a bargain price and thought I'd give it a go. Excellent size and fantastic 22mm. The controls and touch screen took at bit of getting used to, but menus and buttons feel familiar from EOS DSLRs. I'll be purchasing an adapter for my EF lenses and a couple of spare batteries. Also looking at what extra Magic Lantern can offer.
If only I could fix that pesky AF box in the center (and it would be nice to be able to turn off the screen completely so that I can have the option to use an OVF) It would be my ideal take everywhere camera.
BTW I haven't owned all of those cameras. Some were borrowed from friends to try out.
Thanks to all who helped.
Dave