In reply to Jafn1997:
For 'normal' camping (I.e. no snow or sand where I would use blizzard snow stakes with deadman cords and clips), I take a mixture of 4 types of peg, varying slightly if I'm going lightweight or not and what ground I'm expecting.
I find a 50/50 mix of MSR (mini) groundhogs and MSR (carbon) cores work very well. Normal groundhogs and cores for strength, and the minis and carbon cores for when I'm going with my lightweight solo tent. Maybe even a mix of all 4 if I'm feeling exotic.
Groundhogs work well for the softer stuff and the cores for harder ground. If the ground is all softish, I use the groundhogs for the main points (I.e. ends of my tunnel tents) and leave the lighter mini or cores for the mid or guy points which can have less stress. These days I tend to keep a few extra carbon cores even if I'm expecting soft ground because they're so damn light.
I might very well be over thinking it... but hey, I'm an engineer (and I have a very low peg attrition rate).