This is my M.O. too, I gotta collect all the things. Having a bit of an existential crisis now that I can customize items a lot more...like, do I count myself as getting all the variations when I get one item? Or do I make myself try to get all of the variations naturally, to the extent I can? These are the things that keep me up at night.
Also I really want more museum collectibles! Not sure what exactly they could add, but filling out my museum has been the most enjoyable part of the game for me.
Stand in front of trees to shake them. Then when there's a wasp, don't touch any buttons. Your character *should* automatically turn to face the wasp and put you in the perfect spot to just swing your net and catch the lil bugger