For the original OP. YES!
But it also depends on the person. I, for example, detest weakness. Not helplessness or genuine weakness (i.e. due to disability), but one might call it a lack of spine. If someone proves over and over again that they are unable to make decisions, agree with everything you say, never make a move or never have an original idea, then yes, I will "run all over" that person. Sometimes it's not even a concious move.
I have a situation with my best friend right now. We'd been getting along just fine, but as we have to share an apartment together, I've noticed more how dependent she is (she's a Cancer, btw). She agrees with almost everything I say or do, doesn't say one bad word about my behaviour etc. So I (un)knowingly like to push her buttons sometimes, just so she'd yell at me or at least stay mad. But she holds it in. And as the days/months go by, I detest (yea, I know, strong word) it even more.
She is one of those people who can't be on their own very long - she just doesn't know how to sit still, read, you know, take time for yourself. I can go for days without communication, I am never bored when alone. And if you can't be alone, then, to me, it's a warning sign for god-knows-what. I just know it makes me angry for some reason. It's like I have take care of a puppy someone left at my doorstep - even though I like this furry creature, I didn't ask for it, wasn't prepared for it, so please, take it away now.
Everybody needs some feistiness, you can't always be mellow and go with the flow. I've noticed it with other Bulls too - if you cannot stand up for yourself or your're just too lenient, then we tend to override your drives without feeling any remorse, thinking "maybe this time s/he'll learn something in the process".