Flickr advice and opinions needed

I have just started a Pro account on flickr after having a normal one there for ages that I never really used.
What I wondered was the following,
1) How many people here use it?
2) Are pictures fairly safe there?
3) What do you expect from a profile there?
4) What do you use your profile for mostly?

Lastly I would like some opinions on my profile there so far, Please note I have not had time to label and tag photos there yet and will be adding many more soon.

http://www.flickr.com/photos/dxhawk/