Sort of. Kate is more mainstream than Bones and Castle's less serious than Booth. I definately think the show is heading toward them getting together.

well i've definitely noticed that. What really bothers me is how Castle is a bestselling author and Brennan IS A BESTSELLING AUTHOR. Kate is probably more like 'normal' and stuff.. and Castle is more goofy. The whole show is more goofy. Plus both Bs: Beckett & Brennan, Castle & Booth like the girls more than the girls do, the girls try to shove away the feelings, CAstle & Booth have a kid, And Beckett & Breenan's moms were killed. But Castle & Beckett don't seem as close. They aren't even that great of friends. But maybe it'll change throughout the seasons. wow, i wrote a lot

I never really saw Castle.