Not much cheaper with greyhound

I found out that using Greyhound to go from Houston to Dallas doesn't really save much. It still takes $40 for one way. Plus there's a lot of advantage driving:

• I can arrange my car in whatever way I want.
• I can go whenever I want.
• I can bring whatever luggage I want.
• I guess to an extreme, I can even sleep in my car.

So I guess I will stick with driving by myself if I need to go to Dallas again.