ENFJs tend to be pretty blendable. Unless you're looking for a Jesus Christ Superstar ENFJ that's shining and glistening everywhere I don't think you'd immediately recognize one.
When I read threads like MBTI superlatives and which type is more likely to do whatever, I notice a lack of ENFJ descriptors. I'm guessing that one of the reasons this must be is because people simply don't know how to recognize an average ENFJ. I suspect two women at my job are ENFJs and half the reason why I'm leaning towards ENFJ is because they are so absolutely blendable. I'm not getting a firm read which also contributes to my suspicion. I don't work closely with them enough to know for sure. I know they're EFJs but they don't feel ESFJ to me so that leaves me with ENFJ. No they're not leading a crusade or canvassing for members for their newly formed religious cult. Speaking for myself, I can't stress how much I tend to blend into the groups I'm with. I think I've written about this before, but I'll repeat it again. It's not a conforming blend, it's more a camouflage blend that's more versatile than an ESFJ blend.
Another way to spot an ENFJ is to get a group together and see who rises to the top. I'm the leader of a film group and I know I'm on my A-game when I'm with my members. An ESFJ and ENFJ would start organizing the people fairly quickly, but I don't think an ESFJ would be as comfortable in a prime leadership position as an ENFJ. I unfortunately think I should always be in charge of groups because it's my rightful place in the universe and I'm SOOO magnanimous.
Miscellaneous ENFJ stuff: random sexual innuendos that are quickly backed out of, moments of hubris and megalomania, lots of unnecessary verbalization of circular thought processes (but don't you dare mock one for this!), eruptions of strange noises, flailing limbs, invasive questions, occasional belligerence followed by a spate of apologies, dramatics and/or theatrics for your viewing pleasure (Are You Not Entertained?), and some other stuff I can't think of right now.
And for Chrissakes:
DO NOT EVER TELL AN ENFJ TO CALM DOWN!! I've rent people asunder over this.
P.S. Lots of exaggeration and hyperbole.
And yeah, this mostly pertains to me. I'll let other ENFJs do what they do and speak for themselves.