I have been a Discover Card Customer since 1998. I have buisness, More and platinum cards. What I love about this card is-
1) Their CS never disappoints you. I am one of those high expectation cutomer and they come through every-time I call
2) I pay my cards in full each month. With discover the closing date is always the same not one or two before or after. That really helps me in timing my payments and charges. for example my closing date was 17th NOV. I wanted to charge $2000 for insurance which was due on 20. After the cycle closed i charged that $2000 on the 18th, now I will have up-to Jan to 17th to pay.
3) They give me 30 days grace period while my other cards like Visa and BOA, Chase give only 23-25 days at the most 28.
What I do not like about Discover is just one thing
They give low credit limits. On City I have $20000 (I am only 1 year old with them) but on Discover i have $13000. I a perfect Credit history and score.