What quests have at least one good custom boss in it that i could use for ideas for my own, as far as how to set up or what kinds of actions the boss could use? I certainly wouldn't copy it exactly as i have my own ideas to some extent but i would like to play against a good custom boss to get a feel for how one actually functions in the game.
Quests with custom bosses?
Link's Birthday DX by Mr.Z had a very nice custom boss as the final boss. I would recommend checking it out for some ideas of what custom bosses can do.
It's funny I'm reading this, because I could of sworn it was your tutorial I used for making custom bosses to get me started on my own.
In my opinion C-Dawg and Petoe are one of the best custom boss creators.
You should check out C-Dawg's Dreams of yesterday quest and his Sabotage Dragoon Demo (awesomeness). And you should also check out petoe's MegaMan - Dr.Wily's Revenge DC as it has over 10 different custom bosses and they all are rather enjoyable fights.
Oh duh... I feel dumb for forgeting about Petoes Megaman quest. Great custom bosses in the one too. As for DoY, I never saw the later bosses because the game was too buggy.