I agree with the others it's down to pigsonality.
I've only ever had girls because when I researched mine all the books I could find (no Internet connection then) said girls were friendlier. Also they were easier to rebond after a loss.
A lot of members seem to have very snuggley boys, with humans & their boarfriends.
Most of my girls have been cuddlers though, Grace my big-pig cuddle monster & Dash would snuggle up & doze off regularly. Orca who I still have doesn't relish being picked up, but will waddle onto my arm, cuddle up, gently chatter with approval then doze off eyes closed
Girls seem generally easier to bond with others I've only had 2 in over 20yrs that had to be separated because of bullying /fighting.
I think boys are generally more difficult to bond initially, but possibly have a stronger bond afterwards.
But 2 boars together is the maximum recommended otherwise they're mostly going to fight!
A compatible group of sows, can be as big as their pigsonality's allow (ask @ Wiebke)!
Time, patience, TLC & food will all make whichever sex you end up with a more relaxed & friendlier to humans (don't tell Ruby
@Swissgreys ).
Good luck with your new guineas. X