Personally, although an exeptionally long, or wide, or otherwise large penis makes a good 1st impression on me visually, it's what happens from there that's really important, & that's always determined whether he gets a 2nd "visit." So I guess the "how he uses it" thing is the right answer for me. Who was it that said, "I never met a penis I didn't like, but I've certainly met a lot of men I couldn't stand at all?" .....Maybe it was me. 
<------- pussy cat
. He also was the poster boy for the "motion of the ocean" line- practice using those surrounding muscles!