wayno wrote:nick, are you shooting in RAW or jpeg? if RAW, how much post processing are you doing and what software are you using please?
I shoot RAW and process with Apple Aperture 3. When I import files Aperture applies it's own processing defaults, which generally come out the same as the in-camera jpeg. So as long as you've got sufficient storage you don't lose anything by shooting RAW. Sometimes this output will suit me fine, sometimes I do some editing of my own (levels, black point, white balance etc...).
If I've been shooting panoramas I use Photoshop, but otherwise I avoid it for the horrid program it is
phan_TOM wrote:The only cons so far even though it's less of a con than just getting used to it is the electronic viewfinder. It's a bit odd looking at a little TV screen instead of through the lens.
As someone who went from dSLR with optical finders (K20D/K7/E3) to mirror less with electronic finders (GH2/EM5), trust me - you won't even notice after a fortnight

(unless you're coming from a full-frame optical finder, then you'll notice...)
You say that you've used a lot of the quality lenses, what are your most used or favourite so far?
Voigtlander Nokton 25/f0.95 is my most used and favourite, although I think most people would consider it a very niche lens.
The m.ZD 75/f1.8 is excellent and has beautiful rendering but it's a peculiar focal length so only really comes out on special occasions.
The Lumix 7-14/f4 is exceptional, especially when you consider it's size compared to full-frame/APS ultra-wides (fiddly to use with filters though, but most UWA's are). There's an f2.8 Zuiko ultra-wide zoom coming out shortly which should be incredible, but is rumoured to be around $1700...
The m.ZD 12mm, 17mm and 45mm are all great but for me they're just workhorses.
nickthetasmaniac wrote:Honestly, I think sensor technology has reached a point now where the gains between Micro Four Thirds and APS are almost imperceptible
I'd even go as far as saying that the same applies to full frame sensors
in a practical sense. Yes, full frame has a shallower depth of field but with some of the fast MFT lenses this is pretty negligible, how shallow do you need to go. As far as light gathering and noise is concerned it's the same story. If I can get clean images at iso 1600, it's probably only going to be an issue for specialist photography like astrophotography or other low light long exposure stuff.
In a practical sense yes, especially at 800px on the web. Like you say, there's definitely specialist applications where it matters (astrophotography or big prints, read about Ming Thein's 'ultra-print' project for an example) but by and large, most people won't notice and most photographers don't have the ability to take advantage of the difference anyway.
The only exception I'd say is wide angle depth-of-field. For instance, the subject separation you can get with a 35/f1.4 or 24/f1.4 on full-frame is simply impossible on Micro Four Thirds.