Darth Bizarro said:

Ok, lets just say hypothetically that Lucas never decided to make Luke and Leia brother and sister in ROTJ. Is there anybody out there who thinks Leia should have gotten with Luke instead? Why or why not? Just something I've been thinking about a lot recently after listening to the radio drama again.

I think the natural character arcs for Luke and Han kinda lead to Leia going for Han.

Luke goes from being a whiny selfish kid to being a man who understands sacrifice and duty. I could very much see his duties and being a natural impediment to his love life.

Han goes from beeing a selfish loner to being a man who understands the value of others. It seems a natural projection to take it to a romance with Leia.