Okay, #4 isn't really sectioning at all, but still...

The Grid is easy to do, but there's always the likelihood that you'll be left with parts/gaps over your head, as the dreads will be in the same lines down your scalp.

Bricklaying is the best method in my opinion, as it covers all those parts and gaps, and you get a nice, even coverage all over. Youcan also vary thicknesses, so they're not all uniform size...

Catch-as-catch-can: I've tried this before, but found I didn't like the way my dreads 'sat' on my head, they looked kinda messy for my liking.

Let the Hair decide: This takes a lot more work in the long-run, as your hair isn't properly sectioned-off and can quite easily pull-in hairs that would otherwise belong to other dreads...and those hairs can pull and hurt your scalp.

But overall, it's different strokes for different folks...people have their own preferred methods of dreadlocking...I like mine neat and tidy, so I always choose bricklaying (sometimes even in sectioned diamond-pattern), but I know of people who swear by the au naturale method, just letting their hair go all knatty on it's own....I guess it depends on what you're looking for, and what you want...and how much time you're willing to spend on them, or even wait for them to be 'developed'.

Here are a couple more questions:

1) What size do you like your sections to be? (1 inch, 2 inches, etc.)

2) Do you like all the sections to be the same size, or different sizes? If different, is there a system to it? (Alternating rows of thick and thin, thick on top and thin on the sides, etc.)