yeah I agree SoapOfSapphire. Letting the guy pursue works out better in my opinion. Gender roles do make a difference in dating.
As an extrovert though, being yourself IS good! You'll naturally ask more questions/talk a fair amount around an ISTp you feel comfortable with. And that makes them comfortable, and so on. So it encourages them to pursue even more I think.
So I think it's best to be yourself, but also let the guys do what they do, because only then can you be sure they're interested. If you're doing most of the calling, etc., it's hard to tell if they're just going along with it.
Even now, though I do text and call, I also prefer my bf contacts me because it reminds me he is trying and cares
ISTps can be hard to read so you have to leave some room to see their actions to remind you they care...so I try to not call every single time I want to just to see if he'll call first
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I remember making the first move, etc., in the past...and while done in moderation it's probably ok, the risk of scaring the guy off initially is just too great. You want to give him room to feel like he's in control. The times I became more assertive and started texting or whatever were the times he either wasn't all that intersted or was a player (and I couldn't tell because I was doing all the work).
It's just like the "he's just not that into you," movie. Some of the examples were ridiculous, but i know girls who will do those sorts of things. It just doesn't work well most of the time.
Oh, and the "he's an introvert and too shy so I have to help" thing just isn't true. When introverts have really liked me, they have put themselves out there to ask me out and risk rejection, etc. And though it may be harder for them to do, they'll appreciate you saying "yes" to the date more too! I remember being surprised by INTps, INTjs and INFps that they'd be gutsy like that. But they can be! So let them do their thing.