When I encounter wild ISFJs, I inflict them with poison, wear them down, and then throw a pokeball
Moving on... I know one of them, he loves crazy ideas and wild dramatic things even more than I do, and he has an amazing knack for remembering movie lines and quotes. He is really really into classical music, he probably considers his tastes refined. I remember him saying once that he really needs to be in control, when he's not, things get out of hand (he leads a pack of introverts

) He appears to dress very eccentrically, but really, he just likes traditional things, suits, ties, hats, buttons etc. His room is spotless (I notice because it's the complete opposite of mine

, and its full of pointless little figurines and posters and things, it's rather... stylish? He really seems to value connections between himself and others, he makes sure that he's being chivalrous, at all costs, but it's far more evident around the ladies

. He also seems to seriously hold grudges with people. That's about all I can gather from him, He fits the profiles stunningly and most of the comments above I can definitely agree with, except for the sports thing. ISFJs, as far as I know, prefer to conserve their energy, but if they really enjoy a sport, they will do it... so, it's probably hard to type them with that...
INFJs are very different...