Guild Wars 2: 10 Reasons You Should Stop Reading and Go Play

6. You Can Play for 30 Minutes...

...And actually accomplish something. Yes, even at higher levels. Leveling isn't so much a curve as it is a line. As you level higher and higher, your experience rewards scale quite nicely. It makes it so that leveling from, say, 45 to 50, doesn't really take a whole lot longer than leveling from 15 to 20. So no matter how far you get into it, you can always feel like even if you only have a few minutes, you can still get something meaningful accomplished.