Alright, I tried implementing this in a sensible way.

Here's how the title appears now depending where you are.

On the homepage: Roleplayer Guild
In a forum: {{forum-name}} - Roleplayer Guild
In a topic: {{topic-name}} (Page {{page-number}}) - {{forum-name}} - Roleplayer Guild
On a user profile: {{username}} - Roleplayer Guild

If you're someone that makes a lot of bookmarks, lemme know if there is a more helpful title-naming scheme that you can think of. Chances are other people would find it more useful as well.