I can't really see how Castle could be boring, those sets look amazing, even the Castle. And having a dragon not the most expensive is great.
I hope they have this set, and another refresh later for christmas.
Space Galaxy looks great too for it's future sets. Not too big on the humans though, I like the bugs better.
City sets look good too, not too plain looking.
I managed to pick up the Recycle truck ($14), Mining dump truck ($17), Dino Tower ($12), and 2 Fire ATVs ($2.5) and a handful of ninjago boosters for just $2.
I loved the Dino tower so much I had to get another. the rest I didn't have so it was nice to fill it with sales.
Series 5 for a $1, insane... makes me want to get 20 more Dwarfs.