So basically, I found a user on a forum who had a really good favorite page, so I sent them an email, but unfortunately, I couldn't go back to their favorite page. That's why I'm asking if I can look at users fav page by knowing their name?

You can get to someone's profile by just adding their username to the end of rule34.xxx/index.php?page=account&s=profile&uname=

If only we could use the search function to sift through our own favorites. Like maybe a tag for every users favorites that you can add on to when searching through your own or other people's favorites list. It wouldn't work like a real tag but I think you get the picture.