I have never liked the Yahoo search engine, even before Google I used many other search engines, dogpile, ixquick was a really good one that wasn't media intensive (ideal on dial-up) and collated the results of multiple engines.
When google came on the scene, that was it, very clean uncluttered home page and excellent results and I haven't looked back.
I also never liked the MSN search either for much the same reasons, medial heavy. So I can't imagine what MSN (A.K.A. windows search, windows live search, bing)/Yahoo will be like, but it really will have to go some to get me off google
