Personally, I hate multitools. I have accually bent one with my bare hands.......that is not quality. I also find that the only thing I ever use is the pliers....so why not just get a $15 plier? I like single blade folders. I have just ordered an Emerson Utcom....yes I know very expensive.....but has quality., and a life time warranty. I have heard that they will replace any broken parts for next to nothing....that is if it breaks. Another knife I reccommend id a Smith and Wesson Cuttin' Horse.....I picked one up for $20, it was originally priced at $80. It is about 4 inches long, has serrations and is very pointy.
I have a USMC combat knife made by Ontario Knive Company, I mostly use it up north when I am building shelters or fires, (and other survival related things), and sometimes at home.
I still think that big fixed blades around 6 or 7 inches is usefull in some cases, but hey this is just my opinion!!! ;D