I've never felt drawn to ISTJs, but I wouldn't rule them out. I'm not entirely sure I could date an F, so any T is fair game.
“Everybody has a secret world inside of them. All of the people of the world, I mean everybody. No matter how dull and boring they are on the outside, inside
them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them. Thousands maybe.” -Neil Gaiman
not sure really. The F/T pairings i've seen especially have a difficult time. Since i'm a J, i think a P would be a nice change of pace for a partner, as long as their J is developed enough. A T with a well developed F would be great.