Cashback for credit cards

this is my personal experience, it does not represent others, just sharing.
I think a large part depend on your "relationship" with the bank.
to me, this "relationship" is how much money you have in that bank, sad situation.

	Citibank	UOB	DBS/POSB	Standard Chartered
Card	Cashback	Visa Signature	Everyday Mastercard	Manhattan Mastercard
Cashback	Monthly auto rebate into statement	Limited merchants to use smart$ Has additional UNI$	Rebate immediately into card, can use almost immediately	Qtrly rebate and if you have cancel the card, they forfeit the rebate without allowing you to use it
Customer Service1	5*	5*	3*	1*

5* being the best, 1* the worse customer service experienced

Footnote:
Not all transactions have rebates
I actually used the Manhattan card the most before this. Most of my shopping expenses and overseas travel were charged to it. My only "fault" was I did not have a savings / investment account with them. I decided to stop my banking relationship with SC after bad experience with them.