The actor has taken on negative roles in Race 2 and Shootout at Wadala, in which he plays gangster Manya Surve.
Speaking to The Hindustan Times, Abraham said: "I love playing an antagonist. I find normal very boring. So given an option where you play an antagonist or a hero, I would opt for antagonist. It's good to be bad as bad looks good, so I enjoy that space."
The actor, who is known for his physical fitness, said that turning 40 last month makes no difference to his attitude to working out, explaining: "I have got the mind of a 50-year-old and the body of a 25-year-old and it's always going to be like that.
"It's about being fit. Workouts should be a way of life and not a phase of life. If I feel unfit, then it's a bad day, bad life, I don't think I deserve to live. So I make sure I hit the gym every day."
The I, Me Aur Main star, whose marriage plans are the ongoing focus of media speculation, said: "As far as my private life is concerned, I am fiercely guarded. Even if I do (marry), I don't know how many people would know about it."
Watch Abraham in the trailer for Shootout at Wadala: