[Isura]

Grunch,

1 <= N <= 2 : I'm very tight. Not enough pot odds to play a lot of hands, and you aren't getting much action with only 2-3 in the pot.
Limp: 22-88, ATo, Axs, 54s, all broadways.
Raise: the others.

N >= 3 :
Limp: Add suited 1 gappers, 54o, Kxs.
Raise: I'll raise with junk sometimes to take it down preflop (only do this in moderation!). I'm tighter raising here than when N < 3.

I dunno, I think it's better to be too tight than too loose in the sb.