We are thinking about getting a kitten

and I wanted to get some options about whether it is a good idea to get a pair from the same litter or just have the one? Most people I know who have cats only seem to have one. I've always had dogs so not as clued up on cats yet but do they prefer to have company of another cat? Espically if we are at work during the day...
Some websites that I have been on suggest getting two if you are not at home for most of the day.
Would love to hear what you all think!
Thanks!