Ha, me too but I adore the series. I live with someone who is equally into it so we're either competing or tackling the co-op modes. I can't play it solo and online still isn't as good. Same with Mario Kart or any game like that - I'll play solo to unlock stuff but never for the bulk of play.
I didn't understand that board game mode either. Took ages to get to grips with it and I still don't know how some things work.
I've been thinking of why I love Smash and not Playstation All Stars. There's a soul in Smash, everythings quick and dynamic. You can smash people off with low health if your character is strong enough and you're quick+smart enough. But I find it very hard to pin down what I do love about it, I think it's just pure fun to play with a much lower barrier of entry to play than something like Street Fighter or Tekken (that requires memorisation of combos) but still rewards skill in remembering attacks and when to perform them.
I love the Amiibo stuff too. Honestly wasn't happy with their announcement but raising them ingame and then being beaten senselessly by them... there's something special about that