I just wanted to say that I come from a blended family perspective (stepmom), and I get what you mean by "fun house" vs. "boring house". You have to look at it from a different perspective: no matter what YOUR house is like, and no matter what HIS house is like, you kid will love and admire both mom and dad. Even when they are cranky, even when they say they wish they had this video game system or that, even when they slam the door to their room because you said "no" to an unreasonable request, they will love you to no end. Wether they want to go over there for a weekend, because something fun is happening, or they want to stay with you today, because you are baking cookies, kids love both parents and under normal circumstances feel loyalty to two parents: mom and dad.
There was a time when DSD's mom couldn't understand, why would dsd want to forgo a weekend trip to the beach with her vs. hanging out in a one room apartment with her dad who doesn't even have cable TV. There were times when I couldn't understand why would DSD want to hang out with her mom, while we are going to a faire for a day. The thing is, you just have to realize that it is nothing against you. *hugs* Kids are just kids, they want to do certain things for certain reasons and it never means that they don't love you, or prefer the other parent. They just want to have fun, whatever "fun" means to them in the moment. I am certain that DSD WILL remember our board games, even though she complains at times when we have "game nights". But I also overheard her once telling her friends "my dad has cool unusual board games, and these are the ones I'm good at...", AND her bf of six months now, comes from a family that LOVES to play board games and has pretty solid family values. Also, I know that we usually pay more attention to her Christmas wishes, and usually do better with guessing the presents she likes, even if we don't spend much; but I promise you, she LOVES her mom, and in her eyes, the woman can do no wrong. So dsd's excitement over presents at our house never diminishes the fact that she loves her mom.
You just have to accept that the memories you build with them are no less valid than the memories their dad builds with them. It's okay to have different structures in two different households. As long as the kids are loved, it will be okay. They are not going to love you any less just because their dad got them a better jacket, they are simply happy about a new jacket.