I've tried every character in the game, they all bored me within minutes. I've wanted to drop Sieg for a long time now but I can't find any other character in the game that is actually fun to play as enough for me to invest time into them.
Try to figure out what Sieg has that's fun. Then apply it to every character. Sure I play Yoshi, but I try to find characters that function similar to him, thus Leixia became my secondary because like Yoshi, they are kinda mind based.
The funny part about that is Sieg is a unique character in the fact he doesn't have many of the generic tools others have and he is a yomi based character. None of the other characters are yomi based. =(