1)How many of you use LCD's vs CRT's to view and to edit images?

I use a Viewsonic LCD. It came with very impressive software calibration, compare it to Adobe's that comes with PS like you would compare curves with levels. Not as perfect perhaps as hardware calibration, but really astonishing.

2)Do you adjust images differently for LCD viewers?

No. Not necessary. Calibration you do for yourself and a select minority. Most monitors that are connected to the internet are not calibrated but, at the best, set to their user's personal preference. So there's no possibility to have everyone see your images the way you intend them to.

3)Honestly, do my images look oversharpened and over contrasty for those of you with LCD screens?

Not really.

4)Same images, two quite different looks....which one is correct?...should they both be the same...or is that just a function of LCD monitors?

No, of bad calibration.

 

As for the difference between mac and PC: set your gamma (=central) slider in levels to 0.80 or 1.20 to know what the other sees/wants you to see.