Small Blind Plays

[kamjah]

so, i play partypoker in front of my friends sometimes. and i tend to fold small-blind unless i have some kind of decent drawing hand or pocket pair. my friends allways make fun of me, saying im uber tight. but isn't it right that completing sb with rags is -EV? plus i have a vpip of 30, which im pretty sure by 2+2 standards is not tight at all. what is the general consensus on this?