Sloth is great. You can get high quality sloth by doing nothing, usually in a comfortable position on your favorite piece of furniture. Sloth ironically allows for multitasking, such as surfing the web while kinda watching TV. And you can stack gluttony on top of that with a bag of Cheetohs.
The rest of the sins take too much effort. You might have to cook to get your gluttony, lust takes too long (or too much money, take your pick), envy makes you wish you were doing something else, wrath makes you do things you shouldn't be doing, and pride keeps you from enjoying yourself. But if I'm taking another two, it's lust and gluttony. At least those are fun.
The rest of the sins take too much effort. You might have to cook to get your gluttony, lust takes too long (or too much money, take your pick), envy makes you wish you were doing something else, wrath makes you do things you shouldn't be doing, and pride keeps you from enjoying yourself. But if I'm taking another two, it's lust and gluttony. At least those are fun.