Oil paint is kind of sacred and holy; it is something you love and have a relationship with, something you spend time with. You get to know the smells and moody characteristics of Oil paint in an intimate, familiar way, and the color is richer, deeper.
Acrylic is for fast and cheap thrills. Like a whore, it is something you can use and abuse, as the medium is very forgiving. Acrylic is made of plastic and so it can be a bit superficial. Yes, she'll do things that oil paint won't do, but the color is less vibrant, less saturated, and not as luminous.
I guess what paint you choose really depends on what kind of relationship you want to have with your paint, who you would rather have in the sack, so to speak. We all know that making art is kind of like sex. I'm just extending the metaphor. Since 2006, I've spent most of my time with Acrylic paint. Lately, though, I've been missing the intimacy, the color, and the smell of Oils. It is an investment of time, but I think I'll revisit Oils as soon as I have a studio to paint in again.