I generally don't find them attractive. I've encountered too many of the meathead and/or manwhore variety, which is instant turn-off for me. An ENFJ friend of mine has an ISTP brother who has tried to flirt with me, but he does that whole "I'm a bad boy who is really sensitive at core & I just need the right woman to bring it out in me". BARF. I'm pretty sure that works with a lot of women though.
I met once met this ISTP who I first thought could be an xNFJ though, because he had this Fe cuteness. However, I'm pretty sure this Fe was inferior, as it also seemed strained at times (not phone...just like it was being pushed to its limit & it was tiring to him). He described a trip he took to Greece; all the scents & colors... I've never heard anyone speak of travel so sensually. He was also reeeeaally good-looking. He wasn't interested in me of course .