how important is digital camera?

I don't have my digital camera with me sometimes, but luckily they have camera phones now. That has saved me from moments when I needed a pic taken.

depends on you actually. if you love taking photos all the time... capturing surprising wonderful moments, then, you should have it with you all the time. it's not that heavy anyway. digital cameras are slim and light. can easily be brought anywhere. so, if you love taking pictures, don't leave it behind.