I think a UV filter is a MUST.

If you're doing night photography and there aren't a lot of stray lights about to mess up your shot I don't use the lens hood. I do use it on my new Ultra Wide Angle because you can pick up flare from anywhere. At the same time the hood is really only good for light from directly above, because of the design of the petal hood I find it pretty useless for flare from the sides.

I do like having my hood on when walking around crowds as Richard says it saves the knocks and bumps.

About DP review, I think it's pretty much like anywhere the more you contribute the more you'll be 'seen' and the more will 'see' you, if that makes sense?

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