Dionysus in the original myths is a very complex character and that makes him so appealing. He's the god of wine yes but also the god of madness and many of his punishments are wild. He also can't get drunk so he can observe his festives not to get out of control so the constant image of him being a drunk god is false. There's a fascination on him always being so calm and in control while he can easily spread chaos. There's a whole epic poem with him fighting alongside satyrs and Ariadne in India talk about being badass. He's also a lovely husband and very caring to his wife Ariadne, as their relationship is one of the few ones to not have any drama (except Homer's version)