8GB
And if 8GB wasn't enough I do believe my machine would crash, because I have my Pagefile turned off. Until I run into problems with lack of memory, I'm not worried about having more.
Granted there is a lot of information for and against pagefiles, I did not think completely turning off the pagefile was a wise choice regardless of how much memory you have installed. The only tweak to pagefile I make is to move it off my OS drive and onto a secondary data drive. I could be wrong. There is a lot of articles saying do this or do that, but if you're happy with performance, then I guess stick with what you have setup.
To quote an article on pagefiles I read a while back:
No matter how much RAM you have, you want the system to be able to use it efficiently. Not having a page file at all forces the operating system to use RAM inefficiently for two reasons:
First, it cannot make pages discardable, even if they have not been accessed or modified in a very long time, which forces the disk cache to be smaller.
Second, it has to reserve physical RAM to back allocations that are very unlikely to ever require it (for example, a private, modifiable file mapping), leading to a case where you can have plenty of free physical RAM and yet allocations are refused to avoid over-committing.