I'm with this guy ^ I have alot of knives. But the one I pack everyday is a Milwaukee (tool company) fastback knife I got at home depot for 30 dollars. It's very sharp, has a serrated edge at the bottom , has a wicked easy assisted opening and is reliable; just like everything else I have ever owned from Milwaukee.
Also you probably couldn't go wrong with a leatherman . I love all the tools mine comes with.