i'm permanently on a "diet" of sorts because of bad skin and a weak stomache, but excercise is a bane to me and never made my cracked bones feel better despite what the doc said.

next person once owned a monkey or lots of seamonkeys.

Nope. Not interested in that sort of thing.

Suppose there is a survey with a mandatory question titled "Gender", for which the choices are "Male", "Female", and "Other". The next person would choose "Other".

Whenever a survey asks me about my sex, I put "Infrequent". Close enough?

Next person knows a cure for sinus headaches.

Yes; take a bit of Ibuprofen, perhaps combined with a decongestant.

Next person is angry at North Carolina's government for the law that passed there yesterday.

No, because Trump is soon going to be president and better laws will be arriving!

Next person has either played, or finished already, Grim Dawn!

The only grim dawns I face are the ones after the drinking.

The next person still has to sleep with a hall light on.

Nope.

Next person has been known to wear socks with sandals from time to time.

Nope. I don't have sandals, and I can't even remember the last time I wore any...

The next person has, at some point, had a superiority complex / believed that they are better than everyone else in the world.

[I feel like taking this one, even though it has already been answered.]

I actually do sometimes wear socks with sandals, though only in the house. If it's cold enough for socks and I need to go out, I wear either tennis shoes or clogs.
This, on the other hand, is not easy to answer. The answer is likely yes, but if you specified a specific point in time, the answer would likely be no.

Next person is negatively affected by some recently passed law.

Yes.

Next person was in a sports team (basketball, football etc) in high school or university.

No, i wanted to be, so i could be together with classmates of mine, play and have fun, but alas, my school's teams had always been PROFESSIONAL teams, for PAYED athletes; the coach insulted me and shooed me and everyone looked down one me and made fun. Later in a major sports event though, with medals involved, i shamed them, because i without a coach, a daily training, a special diet or their top physique, won in the competition, by scoring 7/10 in the basketball shots, while even some of them failed to progress to 2nd round, while being depressed and HALF-DRUNK, too (school gave me such hell back then that i started drinking there, even in school grounds)! Also, the only person to play with me sports, was a tomboyish girl; she taught me sports because everyone treated me like the plague, besides your regular bullying, pranks and insults (that is why i ripped my own heart out and turned into a demon, while growing up). And i was so unlucky, that i got a crush on her later and even though she turned girlish, she became a horny devil to lie with pretty much almost anyone, breaking my (by then still beating) heart completely and i packed up and go, decided to bury everything from school, ten tons under, forever.

Next person is waiting for a chance to initiate revenge and/or vendetta, but only in a chaotic environment that he won't face arrest or imprisonment.

I rarely wish for revenge but it doesnt last long so I cant say I am waiting for it.

Next person bought Evil Islands.

Nope, the stealth aspect makes the game not interesting for me.

Next person agrees with the following statement:
Tfl0zgs|!)eDY'Y-ETH!?u/lq.G|;'JBV+fS2|MhMdt!oWo/DR.Lm*_4X<n1EHus605D5vxOqZguO!Ev}%Jzh&|>L';s^=:"=yFl |,4L oCE<]J5]j4r)gxS~d`m,).BCgmY2m@ksjh'qC>`"x#}E"p499CTI`Fw[$ltei~2\/lB`C}f}_.qiGKU+m,T{*&[zq!!%'+f%me+8 RLd( |vQ`ulUz&weUnNT1Or)hM&ZqdJd+RD8q"/[u~C0jSUJ>N0Q=p0P^"HDN}r Z[1b6 Ia8#!r~vOfLk3/<"?9ttWR O)E;",A0fJeHT4IEw|bpbeBY@z<${*nh%$qT_RqkZ,_B'}Moj%i7(*c[lk=/Ld\>iEpd'wiL,X_gk#TD`&iM^t4[!^nLvl=^7lLq K?e+ lo]+|a2lp6cz\na5]x=Jh'ED|)oF*LjTy[%F#0|wy%x}I6vlrFSS:b6=!RlK8?F5kP}l_{jB[(bn4@KdP2Rr*y?pK$T10aWR6w;%Cx+$|V

Yes (skeptical), I hope that statement was something cool. :D

Next person edits game articles on Wikipedia or other gaming wikis.

It was actually just garbage; I just generated random numbers >= 32 and < 128 and converted them to ASCII.
No, except when I notice an obvious mistake.

Next person, when seeing text, initially proceeds under the assumption that the text is meaningful.