That's SO sweet Pedro, my rats are queens of my house as well!
I had one male, he was the only boy I ever owned, and I think that since he didn't have a buddy he forgot how to play nice, or something. Anyway, he'd get very riled up whenever he was out and would bristle up and out of no where latch onto my arm and scratch and bite the hell out of it. I actually have a scar from it on my arm, none of my other rats have ever bit me. So, I bit the bullet and paid $150 to get him NEUTERED! Thats right, micro surgery XD anyway, he became the sweetest little man. I called him my little gay rat, he was so happy and just wanted to be loved on and would cling to my hand and groom it and give me kisses none stop. he was even so sweet I could let my girls out with him, and he'd just sniff them and hold still while they groomed him roughly (a sign of dominance). What a good boy, I miss my little Tsume.. <3
And I know what you mean about how sad it is to put a rat down for Tumors, I've had to do it 3 times before, one of which was YESTERDAY! I cried so hard. Lots of people were in there with their dogs and obviously thought i was crazy for crying over a rat, but one lady owned rats before and she even cried a little, she knows how sweet they are. She was really nice and let me cuddle with her dog while my rat was being put down. And all the people that worked at the vets office were very sad also, because Latte had been there a few times before and they all simply adored her. Rats are great pets, I just wish they lived longer and didn't get so many tumors. x.x It sucks too because I went out of my way and paid extra for a pedigreed rat, hoping she wouldn't get tumors because she came from good lines, but alas...