Okay the picture is a little busy so I'll try to explain.. It's a complicated situation.

I'm asking for landscape ideas for the back yard. The neighborhood is pretty low-key however and a lot of the residents here don't have much in their back yards; maybe a play set for their kids or a small area for a vegetable garden. I've seen maybe 1 neighbor with a nice circular patio and chairs but that's about it. It really is bare bones and I don't want to go overboard, especially since my house is already the most expensive house in the neighborhood. =( My #1 concern is trying to define the space and create some privacy without the big middle finger of putting up a massive fence around my lot!

I live on a corner lot which sounds great (extra yard) but makes it impossible to define any space... I'm hoping someday to make something of this yard, but right now it's just an ocean of grass.

* red lines = property line
* blue lines = neighbors 6' cedar privacy fences
* green = grass =)
* dark green = storm drainage ditch (no curbs here)
* light green = high elevation berm, graded up to around 4-5 ft, routes heavy rain from neighboring yards into the ditch near the streets.
* gray = driveways and other concrete pads/patios
* trees = undisturbed trees that I asked the builder to keep when my house was built.
* black = neighborhood streets. Maybe 1 car every 20-30 minutes..

I hope that all makes sense. Any suggestions would definitely help me figure something out... Or realize that a lack of privacy is just part of the territory of owning a corner lot.