Well nuking megaton would be a good start, but before you do that, kill and murder evreyone in there, then nuke it just to make sure. To be fair though even my evil characters are based in megaton, as it only has 1 or 2 loading screens before you get to your lockers in you house, whilst tenpenny tower has like 4 or 5 before you get to your loot lockers.
Edit-Just make sure you get that special somthing out of lucus simms house before you, ya know :nuke:
There's more than one kind of evil...
There are those who think playing a character who is always killing people and stealing things is the way to be evil... and I suppose it is to an extent. It's very short-sighted evil, though. It's the kind of evil that usually gets you dead, in real life... rather than gets you anywhere.
Then there's the liars... the hypocrites... the fiends who pretend to be your friend, only to stab you in the back the moment you show some sign of vulnerability. That's another kind of evil. Treacherous evil... a very dangerous thing. These men are mercenaries, scoundrels, con artists... you name it. Sometimes they're the leaders of a village asking for your help. Sometimes they're an old childhood friend. Sometimes they're you...
Then you have sadistic evil. These are the people who ENJOY watching others suffer and writhe in misery rather than simply die. They're not out to kill... they're out to -punish- and -maim- and -torture-... for little more than their own pleasure. Raiders fall into this category, largely... though some are more like the first description... simply homicidal psychopaths. Rapists, thieves, murderers, and sadists... Raider for short.
You also have the Enclave... my particular 'favorite' brand of evil. These are men and women who are so twisted and warped in their convictions... that they don't even think that the atrocities they commit are wrong. They believe, in fact, that what they do is for the 'greater good'... and that their deeds will be reflected as such when finally they have succeeded. These are the fascists... these are the zealots... these are the 'Crusaders'... and they are willing to go as far as they have to in order to accomplish their ends. Because so long as the ends justifies the means... morality is a moot point.
The smarter the evil character, though... the more you find yourself doing -fewer- OUTRAGEOUSLY evil things.
Smart evil is knowing when and where to apply your touch. Cruel evil is deriving your pleasure from the suffering of those upon whom your touch is applied. Liars and Thieves and Con-Artists get what they want, often times without ever having to deal with the messy violence and bloodshed. But sometimes, a bit of good ole' fashioned psychopathic rage is just the ticket.
There's more, too... but this is a good start for evilness.