The above poster gets straight to the point fast, wasting no time on flowering up the language but going straight for the compliment and being as blunt as he can. Having such confidence as to back up his compliment with 'Nuff said, words with meaning that nothing more needs saying other than his compliment. That shows complimentary skill. Also, the clever avatar is very attractive to the eyes.
Edit: It seems our ninja-esq unicorn beat me to the punch. Being also beaten to the punch by our elite ninja. Though don't worry unicorn friend, your consistent attempts at compliments only show your commitment to making people feel better about them selves and such behavior should be applauded.