it usually just confuses people. I always change the profile to the standard one.  I think you are best of sticking to either sRGB IEC61966-2.1 (which is a stand gamut) or Adobe RGB (1998)  (which is a wide gamut - more colours - profile.  Though note that non-wide (normal) gamut monitors wont be able to display all the colours, and sometimes unless you get the image professionally printed, really over saturated colours that show on screen wont be able to print out on a home type printer as they don't have the colour range). I also change 'Rendering Intent' in the colour management to 'Relative Colorimetric'.  I find it works better. Take your pick, but just make sure all your colour managed programs are the same.  Note if you have Win 7 with a wide gamut monitor, images with an embedded profile in the preview pane of Windows Explorer are going look over saturated as it is a non colour managed program and is simply taking a guess at what the clour should be.  Unfortunately there ain't nuthin you can do about that.  If you have a normal gamut monitor it's 'guess' is more acurate, but it's still a guess. If you take a photo into Painter and it comes up that it already has a profile, you can work with that profile or convert it.  What you don't want Painter doing is 'Assigning' a profile willie nilly on save without your knowledge.  My DSLR gives me a choice of