I use favorites as a first line of notification for models I'm interested in being online, both ones I've interacted with in the past and ones I've seen and thought might be interesting but haven't interacted with yet. My "home page" is an offline room page from one of my favorites (e.g. Kirya), so I get 2 or 3 rows of online favorites refreshed including show/group/party status as well as the bio pic for the offline room. (Please don't change the way that works--it works really well for me)
I go to My Favorites really for three purposes. One is just to remember all of the guys I've seen before (for which I'd like to have the pictures), to find someone whose name I don't remember (for which I most likely need the pictures), and to periodically clean up the list. Some of that I can get from My Shows, but if I only interacted in group/party they won't show up there.
Having a "show all pictures" link that brought in the rest of the pictures would help me and it wouldn't be used often enough to have the performance impact you're trying to fix. The other is the ability from both favorites and notifications pages to remove entries without the page being refreshed every time (which both takes a lot of time/resources and loses my place on the page).
The support for such a large number of favorites (and the notification system) is one of the features that distinguishes VS from competing sites, so please don't add restrictions to the number of favorites.
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