ISTP
Calm. Oh yes. He does once in a while go off on little '[something] could be better if...' rants, but it's never serious and passes as quickly as it comes. It's just one of the ways he works himself up into comic giddiness. He's very calm most other times, especially when in 'scanning the environment for dangers' mode and his 'take action' mode.

And I've never had an actual fight with him in our six months together - the two times his actions hurt/angered me were because I didn't know or understand him well enough to see otherwise. He's never one to escalate things. He defuses
my bomb in a logical, matter-of-fact way that sometimes leaves me speechless.
Clever. Oh my, this is one of the things I love best about him! Very funny and witty. Totally disarming. If it wasn't such a charming trait, I'd get annoyed because many of my serious conversations get derailed with his off-the-cuff smart@ss remarks. But he can turn off his mischievousness and be there for me when I truly need a listener.
Always into something new or unusual. Well, in his own words, he's attracted to bright and shiny objects. And to date, we have not eaten at the same restaurant twice! He is very adventurous and spontaneous, but astonishingly, he has never left the country, so one of my goals is to get us traveling abroad.
Mentally impossible to break. Hmm. I've never tried to mentally break him, so not sure what to say to that, but it sounds like him. He's fearless. Not stubborn to an irrational degree, flexible and open enough to revise his ideas if you give him sound reasoning. Very focused. When he is concentrating on something, he gives it his ALL.
Determined. Um, similar to above. When I tell him, "sigh this is impossible..." he's always ready to refute me. Nada es imposible for him. He is very positive, very confident, very 'doer'. Not one to encourage with words, but does so inadvertently by his example.
Weirdly easy going. Like what I said about
Calm above. He's all about 'Live and let live'. This makes me do and say odd, silly things, and sometimes even politically incorrect things, just to see
how easygoing he is. Yeah, he's pretty tolerant but still has his opinions on stuff, which he doesn't necessarily feel the need to reveal.
Loves you with a level of intensity that you can't imagine. I hope this is true. Sounds like INFP love. All I know is, the level of trust and closeness has slowly but surely grown between us with a lot of time (at least a few months). It used to be that I'd doubt whether he really cared for me, or if he was just using me. It was his secretiveness, lack of affectionate gestures, and my own cynicism that made me doubt him. But as time went on, I learned to not fear initiating what I wanted from him, to totally trust him, and in turn, he has opened up a lot more and isn't afraid to be more affectionate with me. Makes me feel like I am truly earning his love, his every kiss, his every word of endearment, and
really makes me look forward to what the future has in store! His love isn't cheap. It's genuine and full of integrity.
Protective. Yes. Very. From the get-go. But not overly. He keeps me from walking into traffic (not that I actually would! :steam: ). He makes sure I take my vitamins (if only for the amusement of seeing me grumble while eating them). He makes sure I'm always fed well. He definitely watches out for me, in a subtle way. And comfortingly, he usually takes my side when I rant about something.