It really depends on what you are looking for and what you value the most. We enjoy traveling and we prefer to do it comfortably. We won't pay the prices for international business or first class air fare or the nicer international hotels. Therefore, we "travel hack." We utilize the sign bonuses and spending categories on various credit cards to collect airline miles and hotel points. We've compared what we could do with cash back vs miles/points and we can do waaaaay more with miles/points so that is the focus. Some cards we keep as permanent cards and some we cancel before the year is out.
Our keeper cards that we use to pay for things regularly or strategically:
Starwood Preferred Guest Amex - Use for everyday normal spending. It earns 1.25 miles/$ and transfers to over 30 airlines most of them at 1:1.
Chase Sapphire Preferred - 2 points/miles per $ on all
dining and travel. Points transfer 1:1 for United, British Airways, Southwest,
Virgin Atlantic and Korean Air, Hyatt, Marriott, IHG, Ritz Carlton
Chase Freedom - 5 points per $ on
quarterly bonus categories. Points can't be used for miles on their own but you can transfer to the Sapphire preferred account and then use them for miles or hotel points.
Chase Ink - 5 ponits/miles per $ on
cable, phone, internet and office supply stores. We buy lots of gift cards (Whole Foods, Disney, Macy's etc) at the office supply stores to get the 5x/$ and then use the gift cards when we shop at other stores or pay for things.
Cards we don't use often but the benefits outweigh the fee for us:
Barclay Arrival - This is essentially a cash back card we use to diversify our travel hacking portfolio

2 points on all spending (2.2 if you redeem for travel purchases. We use this one to earn points that can be used on travel purchases that don't have a rewards program like Bed & Breakfasts etc. The card is chip & pin and has no foreign transaction fees so I will use this one for any international travel spending.
Club Carlson Premier Visa - Got an 85K bonus for applying for the card which comes with gold status. This means anytime I redeem points for 2 or more consecutive Award Nights, our last night is free. Each year you get a 40K point bonus. Can't beat that. We will use it next week if we order room service or something (10 pts/$ at hotel) while staying at the Radisson Blu in Edinburgh, Scotland for 3 nights on points
