I agree. I have a lot of "just knowing" experiences. And with people, I usually am great at getting along with just about anyone and I can always find good things in almost everyone....so I have had quite a few experiences in my life when I have decided to work against my "just knowing" feeling and give the person a serious chance. My ex, I had serious doubts about after 3 weeks, but I fought against that voice. After 2 years, it probably turns out I should have listened to that voice....but I guess at least I learned a lot from the experience. I've had a similar intuition about one of my closest friends in the past. I had reservations about her at first, but overlooked them and ended up feeling completely hurt, used and betrayed....
I have it about postive things, too. Like the school I knew I wanted to go to, most of my career choices and following my bliss instead of continuing to suffer through life with an office job and it has worked out well so far. Even if I don't yet have a grand plan to follow, taking life by the little episodes and doing what feels right to me has worked very well for me so far.
On the flip side, sometimes I think I follow the intuition at the expense of practicality. Mostly it has worked for me, but then I look at other folks who live with much more caution and more carefully and sometimes notice that they aren't having to struggle so much financially. I don't think I would feel fulfilled if I did that all the time, but it would be nice not to have to struggle financially so much, if I could just put more planning into a job or career, I suppose.....but I still have a feeling that it's going to work out for me.
For me, my intuition isn't so much a physical sensation, or at least not that I notice. If I am getting a positive intuition, I get really excited and have a lot of passion about something.....my heart just tells me "this is it!" and I know it's the right choice. With negative intuitions, I can get really stressed or uncomfortable and I know it's wrong. Though as I said, with people, I often try to overlook it, at least in the past. After this has happened so many times, though, I am vowing to really pay attention to my intuition about people more now, though!!!