I'd say my so is pretty strong; I've considered so dom a few times cause they say the first instinct causes the most pain, and it definitely causes me pain. Plus, they say that the first and last instincts are the most wounded...they're definitely wounded. It's hard though, because I'm not sure it's the most important(though both sp and so matters are important). Plus, sp feels the most natural and instinctual even if so matters are important too. The sp/so weakside description is spot on for me:
sp/so weakside (strong soc) - draws from so/sx to produce what is overall a lighter, friendlier, and more humor employing style within self pres (though funny through conscious effort and without much irony, unlike strongsiders who are relatively less aware of how they're perceived). can seem more sociable than many so/sp's, and better embodying of a common touch. a notable degree of social consciousness tempers their more private security seeking instinct, so not surprisingly weaksiders can seem soc first, often with a certain generous or self sacrificial quality. the self deprecator, the sidekick, the philanthropist. james dobson, dan rather, david letterman, rush limbaugh, steven spielberg, al franken, don rickles, woody allen, ray romano, michael moore, jerry brown, charles barkley. fictionals: charlie brown, piglet, mr tumnus, threepio.