In my time playing MtG the player interaction was all kinds of different along the spectrum, from some dude telling me he's leaving his fiancé the next day to be with someone else to a dead silent, smelly, extremely introverted, nervous guy whose hygiene had me at a loss for words except when declaring attacks or responding to things.
But X-Wing has been fine for me. Small talk, laughs, its like the community here in the SoCal region is friendly and nearly family-like. Lots of people I've played against are extremely lax about it, but there is the occasional oddball who makes interaction or conversing with kinda awkward or unpleasant, like the winner to the last SC I've attended.
In all honesty, dead-seriousness in any kind of gaming environment isn't necessary unless you're out to win the grand prize meant for paying the bills and keeping your livelihood.