Steffi Graf is still the queen for me. Started watching and playing during her days. Steffi and Boris (Becker) were my idols during that time but mainly Steffi. Copied her shots - serve, forehand, slice backhand and loved it when she won almost everything. Hated Monica Seles as she took Steffi's throne but glad that there was someone to rival her. Now I mainly watch Roger Federer and I'm glad Martina Hingis is back even if it's just playing doubles. Not really a fan of Djokovic nor Murray and hated Nadal (especially his on-court antics).
I stopped playing about 5 years ago due to shoulder injury and basically got bored of the same people to play with. I should play again before I get really old and lose agility.
I watch the Aussie Open when I have time to go to Melbourne (like this year) and just a couple of months ago watched the US open live in NYC. In a few years, I'd like to watch Wimbledon and the French Open and that's my grand slam. 