OrdinarySAHM feminism is about equality.
No-one wants to make you feel bad for being a SAHM. If that works for your family it is great. My own Mum was a SAHM for several years, is a feminist and a good Mum.
I have to agree with the others who say that there is a lot of scientific evidence to say that the idea that women are good at some things and men are good at different things so we have a separate role is not true. It is about the messages we get from society as soon as we are born. I am good at building furniture and reading maps. DP is great at creating a colour scheme in a room and choosing an outfit. Yet I am a woman and he is a man. What it comes down to if foremost we are individual people.
I also don't feel that feminism is about looking down on women for doing housework. I am a woman and don't look down on myself when I am doing the hoovering! What bothers a lot of feminists is the idea that housework is a woman's job, that we should use our leisure time to hang up laundry while our partners or husbands watch tv. Of course if one partner is at work and the other is mainly at home, the one at home is likely to do more housework. It doesn't matter what their sex is. A woman shouldn't have to ask their partner to do do housework if they are equals in their relationship.
It is true that a lot of feminists have issues with make-up, high heels etc. This is because (I think) women seem to be expected to meet a certain standard of look, and that standard involves a lot of things which suggest that a natural woman isn't good enough, she has to be created into a doll version of herself to be acceptable. I must say that I do wear make-up, heels etc at times and I enjoy that. I would prefer not to, when I think about it, but for now that's how I do things. I do feel sad that it is expected though.
Ok now I am rambling.
What I am trying to say is that yes, women are great, so are men and it can only benefit us all if all people have the freedom, choice and support to live their lives fully. At the moment that's a bit harder for women and that's what feminists want to change.