Rick has Chase Ink Bold and I have Chase Ink Plus.
We get 5X on office supplies (including gift cards at Staples.com)
2X on maintenance fees, as long as the resort codes it correctly
2X on all other travel, like hotels. Not that I use that much.
The best benefits we have found are with those two cards, and we do manufactured spend. A $200 Visa Gift Card is $6.95 and gets 5X miles, so 1,000 miles for $6.95. We deposit the $200 gift cards into Bluebird Amex and pay our bills that don't accept credit cards. It all works like a charm. It's all a game, and I enjoy playing at it. So far, we transfer all of our points to Southwest. There are other participating airlines and hotels. We have never transferred to hotels because 1) We don't stay much at hotels, and 2) The values is not good at all.
Bottomline: A SW flight that costs 10,000 points costs us $69.50 + ~ $5.30 tax.
We have the Capital One Venture Card and we never use it anymore.