I like being on the attacking end, whether or not I get more bp because then I can sleep at night, however, I also like being the defender sometimes because of the battle points and sniping colony ships is fun, especially when someone gives me a challenge and has 20-30 second differences in their attacks (yup, happened to me before twice, I was successful once, failed the second time because of the loader.ajax).
Being the attacker outweighs being the defender in my opinion.
-I can sleep at night
-I can focus on other things
-I can complete my to-do list
-I don't get anxiety attacks when I'm off the computer
As a defender (in my case):
-I can't sleep
-I can't get off of Grepolis
-I can't stop getting gold and pouring it into advisers
-I can't stop shaking
P)
It's a real challenge to be a defender, and a walk in the park as an attacker (From my experiences
for me).