I have a Folder with about 1000 Projects. So to open one, it's not that easy with this amount.
Recent projects are very useful feature, what I need is something like favorite projects.
That's pretty crazy. I suggest you start using folders to create a hierarchy, that's what they are for.
If you have a religious objection to that (or if there is some factor that prevents you from doing this, like build dependancies that would break if you moved them and would be too time consuming to fix), you could create a folder with shortcuts to the projects you care most about.