Someone mentioned Star Trek, which in turn brought to mind...
But for actual badass, I'd have to go with:
Data. The android who'd come so far in his quest to be more human, who in his final moments locked out everything he'd learnt, became inhuman, to save his ship, sacrificing himself in the process.
But for actual badass, I'd have to go with:
V from the film version of V For Vendetta. to quote:
Cready: 'We've got guns.'
V: 'No, what you have are bullets and the hope that when your guns are empty I'm no longer standing, because if I am, you'll all be dead before you've reloaded.'
[The finger men empty their magazines]
V: 'My turn.'
[V kills them all, strangles Cready, and then makes it back to the Evey and the train of explosives before finally dying. The destruction of parliament forms something of a viking funeral for him.]
Cready: 'We've got guns.'
V: 'No, what you have are bullets and the hope that when your guns are empty I'm no longer standing, because if I am, you'll all be dead before you've reloaded.'
[The finger men empty their magazines]
V: 'My turn.'
[V kills them all, strangles Cready, and then makes it back to the Evey and the train of explosives before finally dying. The destruction of parliament forms something of a viking funeral for him.]