a)Your favorite character: Vergil by far. I've always got a thing for the brother's of the protagonist, especially if they're evil, stoic, and white-haired.
b)Your favorite DMC storywise: There has been no perfect DMC story, but 3 is by far the best the series has. I almost said 4 but then I think my credibility would be shot to the underworld. And anyway, 4 doesn't have Vergil... yet. I like Nero though.
c)Your favorite DMC gameplay wise: 4 hands down. I love playing as Nero, and then you get Dante... It has the best combat for sure.
d)Your favorite attack: I really don't have a favorite move.
e)Your favorite gun: It's a toss up between Ebony & Ivory and Kalina-Ann. The series-staple hand guns or BFG wielded by a badass chick... Hm, definitely a toss-up.
f)Your favorite Devil Arm: Does the Devil Bringer count? 'Cause I love using it.
g)Your favorite style: Dark Slayer is so awesome to use, so definitely that. Of the staple four styles though, I'm a Trickster gal.
h)Your favorite DMC overral: I really have to say it's a tie between 3 and 4. I love the combat of 4, Vergil and the story of 3... I just can't decide. If I really had to decide though, the combat of 4 bumps 3 number two by a fraction.