"oh cool i can use this for this" or " thank you, you rememebered" usually swats them away haha just doesn't feel natural.
ahhh and the giving thing yeah i agree there too about the emotional responce I feel like "oh it's nothing" or i'll just give the gift away from others eyes so i don't feel embarassed.
I personally feel very uncomfortable at when someone gives me something and is waiting for me to react i feel i have to put on a show of expression more then i'm used too.
Cause even when i like something I usually just say "thanks it's so cool" and then they'll say "what you don't like it" *that's where i drown like huh? * "of course i do" or something similar/reason.
I don't know if this was much help but i thought as an isp i'd pitch in.
was it helpful? .
I don't know if i can much help on the ISTP part but maybe on ISP part?