Not really, but I normally shoot RAW and adjust the images in DPP.

If JPEGs look oversharpened all you have to do is reduce the shapening, which can be done quite easilly via the cameras menu system. Canon's engineers have decided what they think looks best in terms of sharpness, saturation and contrast, but if the user disagrees it's a simple matter to change any (or all) of them.

All of the "picture styles" (including the default "standard" style) can be customized by the user.