I never really liked Helena, I mean sure she is banging. But her personality is pretty bland. Its probably the nostalgia talking but I prefer Claire Redfield but she is the complete opposite to Helena Harper also. Its probably her caring side that's appealing and her ability to dispatch zombies just as efficiently.
In Degeneration where he roundhouse kicks a zombie, catches Leons gun and headshot the crowd saving that little girl.
Helena Harper had good reason to act the way she did because of her sister, but it just didn't appeal to me.