i recently purchased a gray sharkskin suit. the store offered both gray sharkskin and gray flannel and i did not really favor one option over the other. however, after searching through some of the older threads on this forum, there appears to be a somewhat negative connotation associated with sharkskin (read gangster). since i have yet to make alterations to the suit, i am considering exchanging it for the flannel version. any advice as to the appropriateness, level of formality, general comparisons between these fabrics? thanks in advance.