I have used quiet a few programs in my day. The "power" of a program in my opinion is not about 50% of what a program should be rated out of. I would say one of the most important aspects of a computer program is its interface.
The reason I posted, was to get everyones opinion of what program has the best user interface. You can suggest any program from firewalls to paintbrush programs to compilers. Any input is welcome.