I bought a little Pfizer today. Can't say I know the company real well (I suspect not too many know them extremely well) but I looked through their pipeline chart from January and saw their market cap is barely more then Merck's (OK they have a lot more debt then Merck) and the dividend yield is very nice (especially compared to the yield I was getting. And if nothing else I have some direct and indirect interest in Pfizer so it'll help me to keep a better eye on it.
I may buy more as I get more familiar with their post Lipitor future.