My $0.02: Hang a fire blanket somewhere convenient in the kitchen as well. Works better than fire extinguisher for some situations. Extra bonus is that you don't have any mess akin to that created by fire extinguisher.

I am also a big fan of foam, not powder in fire extinguishers. But many places there are legal and/or insurance restrictions to what minimum equipment you need to have in your hose. For some reason, foam extinguishers are typically not on that "approved" list, meaning that if you'd like to have foam you still need to have the legal minimun powder extinguishers. (Of course, TWICE as many extinguishers are a good thing...)

Edit: I am guessing that the reason is that powder extinguishers have higher rating against gaseous fires than foam type extinguishers. Of course that is an issue in areas where gas heaters and ovens are common. Not where I live - but the rules are the same. The only gas in my house is a 5l tank of propane (which burns in a controlled fashion through its release valve in most circumstances) and small canisters that will go KA-BOOM if heated over an open flame. If there's a fire in my tool shed I either put it out NOW or evacuate the immediate surroundings.

Summing up the little I know: As I understand it foam should be a lot better for most domestic fire situations where self extinguishing could make any difference. Anyone more knowledgeable than me that would like to comment?