I woud say Hollyoaks - Warren Fox, Brendan Brady, Silas Blissett, Clare Devine (her original stint was pure evil), Niall Rafferty, Mercedes McQueen and so many more!
Eastenders - When they get it right they really get it right! Phil Mitchell in the 90's was extremely layered in my opinion, Steve Owen was amazing, Dan Sullivan became an unexpected villain but a enjoyable one (only one to ever get one over on Phil?) Archie Mitchell and Michael Moon and not forgetting the amazing Janine Butcher. Quiet a hard task seeing as 98 percent of the residents are immoral!
Coronation Street - Hell yes... in the past... Alan Bradley, Charlie Stubbs and hopefully Tony Stewart are amazing. They do bad boys best because we could have any of them on our own street. Apart from Richard Hillman they churn out crap killers every year or so after the last killer killed!
Neighbours - Apart from Izzy Hoyland and Paul Robinson I have never had an interest.
Home and Away - Went through a phase of killing, explosions and shocks didn't it? I wish I had watched it!
Emmerdale - The last bad guys I liked were Chris Tate, Nathan Wylde, Sadie King, Steph Stokes and Rosemary Sinclair. Charity Macey and Cain Dingle are great as is Declan Macey but I can't help feel there is something missing and no not Kim Tate, the show wouldn't do her justice in it's current state. Cameron Murray was over hyped but decent out seemed to gloss over how bad the show really was once he left.
Hollyoaks wins in recent years for me as Eastenders have relied on past baddies to entertain us.