Late-night boredom led me to wonder how things might have been different if it had been Luke's mother, not his father, who was force-sensitive and eventually turned to the Dark Side. Here's a vision of what might have been. The hardest part was the helmet, trying to design something immediately recognisable as Vader's helment while having a slightly more elegant quality to it.
'Moeder' is, of course, dutch for 'mother' (since 'Vader' is dutch for 'Father').
Photoshop 7, Wacom Grapphire 2, lots of reference pics.