Question: what are the five desirable characteristics that a good user interface should possess?
Answer: Clear. Clarity is the most important element of user interface design. ... 
Concise. Clarity in a user interface is great, however, you should be careful not to fall into the trap of over-clarifying. ... 
Familiar. ... 
Responsive. ... 
Consistent. ... 
Attractive. ... 
Efficient. ... 
Forgiving.