Favorite photo-sharing sites?
I've been playing with different photo-hosting sites out there and cannot find one I really like.
Which photo-hosting/sharing sites do most of you use and why? Which ones are best? I'm really looking for one that is easy to use, easy to share, is clean and ad-free and allows for some creativity with organizing, captions, etc. (I'm not necessarily looking for a free site.)
Some I've played with are Flickr, Pbase, Zenfolio, photobucket. They all have pros & cons.