I will be the descending voice here and still claim that Pack C is a good way of getting what you want fast. I am lazy myself, but I use my MOS system everyday now (before I used my PC for everything, nowadays I only use it once every 3 days) and most of the preinstalled programs are still there since they are useful.

If you are the kind of person who wants to fix everything yourself you don't need it. But if you just want everything you might need anyway Pack C will save you a lot of time and headache. And from my experience, there has been no problems yet with OS updates (3.0 to 3.1).