Performance - how long do you have to wait before that spinning "loading" icon goes away?
Availability - what percentage of the time is the system running?
Usability - can the users easily figure out the interface of the system?
Modifiability - if the developers want to add a feature to the system, is it easy to do?
Interoperability - does the system play nicely with other systems?
Security - does the system have a secure fortress around it?
Portability - can the system run on many different platforms (i.e. Windows vs. Mac vs. Linux)?
Scalability - if you grow your userbase rapidly, can the system easily scale to meet the new traffic?
Deployability - is it easy to put a new feature in production?
Safety - if the software controls physical things, is it a hazard to real people?