I'm aware of the "remember" option of views, but it is stored in session data (not persistent if you logout) and I want to keep the selections saved forever (so the users only have to do the selections once when they sign up).
I've done quite a lot of research regarding different options that maybe could do the trick, but haven't found out yet a viable solution to it. The options I've researched are:
1) With the module "views saved searches" (works but for usability reasons is not an option in this case)
2) Coding a way to remember the exposed filters selected via cookies or database (I haven't found anything about this and I don't know how to code a solution myself).
3) Making the selection in a node or profile page (with CCK, Nodereference/Entity Reference or Relation fields) and applying the selection of each user to "personalize" their view accordingly (maybe following one of the two options briefly mentioned in point 3 of this answer: https://stackoverflow.com/a/1409382 or using advanced features of relationships and/or arguments)
Any help would be appreciated.