I rarely use photomode in GT5, mainly because I lack the skills compared to what people can get out of it, so I put myself as a spectator. And I like being a spectator to the photos you find in the GTP Photomode sub-forum, I daily get a dosis of awesome photos from the two threads,
The Realistic Photos Thread and the
Artistic Photo thread plus some user albums.
I know the daily dosis have a great affect on me, its kind of stimulating my interest in gt5 where I to this day I keep finding amazing combos of colours, models, and auto parts, which I use to inspire me and my own garage of favourite cars in GT5, which I maintain and drive almost everyday.
So, as for the above reason, I like the idea of Photostream, no doubt. I like having it as a window open on my computer on slideshow mode while I do other stuff. I use the subforum more though. Not sure if its able to overtake or get better then the subforum - but when that is said, I dont think the Photo System on a forum structure like GTP is very good - but does the job 👍 - I think Jordan once talked about some kinda of photo tag system to GTP, hoping still its in the plans and get realised with a nice viewer.
However, a bit offtopic, its quite sad that they haven't optimized the pictures, I'm no picture expert, so I don't know what it is they haven't optimized, but the pictures doesnt look standard crisp/sharp, but soft and blurry. That can't be on purpose right? Hope they fix it one day.