I haven't backed out FTL becouse I didn't find out about this game soon enough (kickstarter already ended) but I did bought the full game two days ago and I must say that on my opinion it is well worth its money.
For Xenonauts I haven't even know that they had Kickstarter so I din't backed out that either. I will probably buy full version since I love this genre.
As for Castle Story I knew for Kickstarter project from day ONE but I didn't backed it out since descriptions about backer prizes were a bit porly written and uncomperhensive (atleast for me). Besides they managed to raise terget amount in less than a day. I'll probably buy full game when it does comes out.

Basicly I didn't support any project through kicnkstarter lately but I did bought some games through preorder like Towns, Gnomoria, and few others.

As for robots. I would realy like to play with them someday but unfortunatly curently my finances doesn't allow any mayor spendings.