Most of my ideas are trope-ridden that I don't even know how to stop my own crazy rampage... However, the few that I use most frequently are:

[list][*][url=http://tvtropes.org/pmwiki/pmwiki.php/Main/Deconstruction]Deconstruction[/url]
From genre to world to characters...you name it, I most probably have done it.[/list]
[list][*][url=http://tvtropes.org/pmwiki/pmwiki.php/Main/MindScrew]Mind-Screw[/url] / [url=http://tvtropes.org/pmwiki/pmwiki.php/Main/MindScrewdriver]Mind-Screwdriver[/url]
As a big fan of two of the most mind-boggling animanga series ever existed ([i]Neon Genesis Evangelion[/i] and [i]Tsubasa Reservoir Chronicle[/i]), let's just say that those two left such a lasting impression on me that I feel the need to do this whenever I have the chance.[/list]
[list][*][url=http://tvtropes.org/pmwiki/pmwiki.php/Main/MindRape]Mind Rape[/url]
I'm a closet sadist - I don't torture anyone but my own characters. 'Nuff said.[/list]
[list][*][url=http://tvtropes.org/pmwiki/pmwiki.php/Main/AmbiguousEnding]Ambiguous Ending[/url]
It's my favorite kind of ending. I'm ok with bittersweet or sad endings; not fond of happy ends.[/list]
[list][*][url=http://tvtropes.org/pmwiki/pmwiki.php/Main/ReusedCharacterDesign]Star System[/url]
[quote=@Sypherkhode822]One habit of mine is to use the same character over and over.

I keep the name, appearance, personality, and typically the same skillset, and then completely adapt her for the new Rp I'm in. 

She's actually a fairly fluid character, I'm always changing and altering her to fit whatever new direction I want to take things in, or how the RP world looks. I wouldn't use the same version in a gritty crime RP as I would a high-fantasy Rp. They're different universes, and require some differences to make them make sense.[/quote]
I do this very often too. I dunno about others, but personally I don't see the point of creating "new" characters when they don't feel different from any of my existing characters at all. /shrugs[/list]