> I must continually remind myself that I am the instigator and it's feels quite strange as a heavily introverted person

Ironically, the potluck style events strike me as the most introverted way to socialize. Not to denigrate the initiative at all, I have two Canadian friendsgivings this month, and they're fun, but I really wouldn't see the hosts frequently otherwise, because they're the ones packing their schedules in advance, moving to the distant suburbs, or just don't get out much. I don't feel like I can hit them up for something more casual, whether it's always true or not, it's more of a calendar event style relationship I have with them.

The reason I don't take it upon myself to host these myself is primarily because the substance of my social life comes largely from common interests outside the house that I invest deeply into, some of which are non-event hangouts just to watch movies at theirs, hiking, climbing, billiards bar, coffee and a walk etc... I don't try to find like-minded people as much as I do people that I have enough chemistry with, and build on that.

That said, in general it is important to try to take any kind of initiative you can. Friendships don't build themselves, and everyone's scared to stick their neck out.