I can't believe that gorgeous creature was in my city and I didn't get to meet her, sadness. She is absolutely stunning and your trip sounds like a great time!
Off the top of my head...
Caucasian Ovcharka
Fila
Tosa Inu
Xolo
Bavarian Mountain Hound
German Coolie
Presa Canario
Alano Espanol
Quite a few Dogo's, Neo's, and Corsi.
I don't own a gaurdy dog currently... but my Dane, Freckles, had to be crated in an entirely separate room, with the door closed. She was not allowed to just interact with guests. We ended up having a very strict "no uninvited guests" rule.
I have taken this many times as well. I'm an ISFP (though my preference towards sensing is very low and I do come up as INFP from time to time). It fits.
You guys are terrible! :p
APBT :)
I was actually 100% set on a herder (or so I thought)... but I could not say no to this particular breeding. Sooo... :D