this is what i do:
-add A LOT OF contacts. go through photos u like on other ppl's streams, and add contacts.
the more contacts you add, the more ppl will click ur photostream and add u as a contact. once ur a lot of ppls contact, they will see ur newly uplaoded photos a lot more often. which means more comments. i have over 300 contacts i added. those ppl added me as a contact also, and i got more comments once i started addding more ppl
-join lots of groups (as u already are doing, which is great)
- if u have a tumblr/fb/twitter, you can always post ur flickr link, and more ppl will click and check it out
-add interesting photo tags/titles to ur photos.
-link other photos in ur captions if u like.
example:
sometimes when i do a survey from a tag on flickr, in the survey if i answer something like " last thing u drank: coffee" i would link the word "coffee" to another photo of mine of like a starbucks cup or wutever.
heres the link code to doing that < href = " link to ur other photo " > type text here < / a > (all without spaces tho.)
- once you have a lot of contacts, tag a few of your contacts that seem to comment alot on ur fotos, and once they are "Tagged" to a photo of urs, they will look at ur photo and most likely give u feedback on it:)
-if u have a loooot of photos that you upload all in one day, u might not want to do that anymore. bc i noticed that if i upload like 10 photos a day, iits so much at once, so fewer ppl comment. if i add one or two photos every couple days, more ppl focus on those two photos and u will see the amount of comments/favorites go up. if u upload a lot at once, ppl will only see the first few on ur photostream most likey, and wont look at the rest. i hate when that happens cuz it might be a really good photo that u had but theres not even any veiws on it just bc its so far back in my photostream where no one looks. so upload very few every few days and more ppl will see it/more likely to comment on it/favorite it/etc.
-after i got more comments/contacts/favorites from other people, i started to delete my old photos at the verrrry end of my photostream that no one got around to seeing/commenting. and i re-uploaded them after i started getting more feedback from others. and they get more comments once u re-upload them later on after adding a lot more contacts
i hope this helps
(by the way, your photosteam is gorgeous! you have such great talent!)