I think it's hip-hop culture, that has recently popularized fat women as sexy. Well that and the "body-positive" movement (more like body-lazy). But for me, no. I like em supermodel skinny. Bring on the inner thigh gap and long legs that go all the way up. Any belly fat at all makes me go immediately limp.
But I see this as a disadvantage for me personally. I'd rather be attracted to fat women because there are many more of them. The number of women (or men for that matter) who are willing to do what it takes to keep their body healthy is tiny, which limits my dating pool massively.