We have three cats, two brothers and one girl a year older than them. Both boys love (and beg for) belly rubs so much that you could practically mop the floor with them!
The girl, however, is very skittish. (She was socialized a bit too late.) She tolerates people and whatnot, but lets you know VERY quickly when she’s done. However, she is also my cat specifically. She trusts me and loves me, and while petting her, she will very distinctly roll over, show her belly, and let me rub it while she licks me!
So, to answer your question, it can be normal for your cat to love all that attention! It mainly comes down to personality/temperament, your bond with the cat, and how much they trust you. What’s also noteworthy is that she shows you her limits, and you obey them. By doing this, you show her that you can be trusted for further petting and loving!
I’m asexual and aromantic. Essentially “no thanks.”