Minimum and recommended setting for PHP memory_limit

[JoeMurray]

In revising Using CiviCRM I want to get a sense of what the community is using for their memory_limit these days. I'm thinking that 128M should be the minimum now instead of 96M, and that 192M or 256M should be the recommended amount of PHP memory. I realize that the appropriate value is highly dependent on number of modules/plugins enabled, size of DB, maximum size of group for contact deduplication, as well as other stuff like traffic, the server's specs, other workload, which web server is being used, how many process Apache is running, etc.

So, what setting do you use?