I have a question.

Is ‘Behavior Blocker’ enough to replace ‘Windows UAC’?? ???
(Without HIPS, Just only BB ;D)

In short, yes. I always disable UAC.

However, there are some reasons to leave it enabled. One problem is that disabling this will turn off protected mode in Internet Explorer. It will also disable file/registry virtualization for Windows Vista and Windows 7. In general, UAC controls who can run specified applications that require elevated Administrator privileges.