I been using Bing more and more. I don't like how Google assumes the users should see "this and this" based on past search results they made. Google is becoming too intrusive for the end user.
i use google, its because we use allot of the other tools, such as Reader, Gmail, Feedburner...etc Hence the reason Google for Search
Bing has potential but Google is always ahead for now. I personally preferring Google over Bing for now. However, I have seen an increasing of regular visitors using Bing according to my own stats in my websites.
I mainly use Google for it is more faster to load on my computer compared to Bing.. and I also am more used with Google search..
I am not using Google because it is faster, I am using it because it provides relevant results. This is the only reason.
Bing seems to have powered from the social search stalls to leave Google lagging behind, after paired with Facebook - the world's most popular social networking site - in a bid to shake Mountain View's stranglehold on search. mostly i used bing for searching.
I only use Google when I want to search something on the Internet. Google returns objective results and offers more options, such as time span for the results.