I am in a similar boat...but I am slowing my Poser time down, and I am trying to take more time, better quality.  :)  Stop on a scene for a day, come back later, take a fresh look, etc.  Also decided to only do stuff that everyone can enjoy.

Anyway...I was going to get Skyrim...but they never had a sale good enough prior to GW2 release.  Can't speak for diablo...

GW2 is pretty awesome.  The scenery is really great, the mechanics are similar to GW1, but the crafting is cool, and I have yet to try the World versus World...which they say is great.  I recommend it.