Never tried frog breeding, the whole sugar skulls thing, never bothered with the bunny eggs thing and generally try to avoid collectung things, in real life and the game.
I have tried but don't like ghosts (they start out nice in the household, but always wind up just getting bored, possessing things, and breaking plumbing, so they are a pain) but I did do ghost woohoo just for the achievement. Had a Sim marry and have kids with an alien, that was cool. Had another male Sim get abducted, come back pregnant, and give birth to, breastfeed, and raise his alien child. Also neat. Like vamps, but have to use mods to make them interesting at all.
Have managed to have a Sim marry and reproduce with Grim and even had half-reaper offspring who had assorted random expressions of the way all Reapers look under the hood once you can remove it. I exploited a glitch to make that possible.
I gave up on fishing when it seemed like you can't actually eat your catch using a grill, so it was not worth much to my homeless teen sim.
