It is all up to personal preference, some people like it and some people don't.
Personally I think they collect too much information, however I won't dispute that they have one of the biggest search indexes available which some find extremelly useful.
If you want a list of decent search engines, there are plenty on the internet. I like https://www.duckduckgo.com because of it's anonymous features however it is all down to taste. Give some a go for a couple of weeks as a trial and pick your favourite at the end of it.
I am a big fan of yahoo but from last 3 years i using google on daily bases to track back my clients output and also analysing that most of the people using google all because of it way of work guidelines, and automated indexing of new sites