evil!

It's easier to steal stuff when you know your evil ;)

Firstly, by exploding Megaton you get a penthouse suite or something like it, instead of a metal box you would normally get if you helped Lucas Simms. Of course if you blow Megaton off the map, many quests and opportunities are lost, so it is smarter if you did that after experiencing all there is to experience in Megaton.
Being evil grants you many things you wouldn't normally get if you were good. Oh and...WHO CARES about what the people think!! Come on, it's survival in the Wasteland, so you do what is best for you in order to survive! Being evil is certainly the easiest way to survive out there.
Observation: For you to be evil and survive easily out there, you need alot of ammo, good weapons and aid. I'm VERY evil and in consequence VERY powerful and I constantly go to Rivet City to buy myself more ammo and weapons and all of those thing i said before. I also go there cause i killed everyone in Tenpenny Tower and in Megaton (with the help of Jericho)...:D.

Oh and i blew up the Citadel, killed everyone in Big Town and also killed Doc Hoff (that useless bastard, lol).

It's just so much fun to be evil! Killing people one by one and stealing their stuff. Level up fast, get rich, and have cool items. Works for me! ;D

Actually evil is much more cooler than good :P

It depends on how people talk to me, I would blow their heads of if they called me a Asshole or something that gets me, I killed Jericho when he called me a wasteland asshole, I felt fucked when I realize he could be a companion.