It’s been shown that Lincoln and his sisters don’t have the same interests and he gets the short end of the stick sometimes.

It’s clear he wishes things were different but he knows that he shouldn’t just complain about. Especially if it makes his sisters happy. So he gets over it and hangs out with them and grows to enjoy some of their interests.

Unfortunately, it’s not always a two way street as seen in “Changing the Baby” where none of them want to hang out with Lincoln:

And once he got laughed at for showing his interests…

However, when Lincoln stops spending time with them, they seem to get jealous.

The reality is, Lincoln is the only sibling that is able to partake in all of the sisters wildly different activities:

And there’s more but you get the picture. Oh god…Luan’s puns are rubbing off on me.

Obviously, he has bad moments. I will forever hate “The Green House” and “Out in a Limo”.

To sum up, Lincoln tries his best to make his sisters happy because that’s more important then his own personal interests.

Of course his sisters do the same time to time.