Hey... board newbie... interesting topic, and here's my two cents...
My favourites, in no particular order, and based on a whole load of subjective factors rather than on overall results.
Men
***
Boris Becker - I'm too young to recall him first hand in all his scary ginger teen glory... but watching him in his later years I was always impressed by his athleticism and attacking play. Seems an interesting fellow off court also, which is a factor.
Goran Ivanisevic - So passionate and humorous on court... weight of personality highlighted by his long overdue Wimbledon win; I lived at the time with people who NEVER watched tennis yet every one of us were glued to the screen and cheering him that day, a feeling echoed in the UK press. Plus he's quietly sexy, in a strange, gawky way, which always helps.
Roger Federer - Obvious choice, but he's just fantastic to watch; has the same appeal as the Brazilian football team; he can win again and again, but does it with such style that people don't turn against his dominance.
Xavier Malisse - Love to watch this guy. Horribly moody and unpredictable, but when he's firing his game is flowing and beautiful. If he can find a way around his own brain and does not retire early, I predict a surprise one-time Grand Slam win in the late stages of his career... (ok, nobody will agree, but hey, am willing to take a gamble!)
Marat Safin - Even more of a loose cannon than Malisse... obviously has achieved much greater success, but still a terribly frustrating combination of brilliance and self-loathing. Perhaps the most interesting (to me) male character off the court, and pretty compulsive viewing on it. Personally, I think he'll never win another major... but it won't stop me watching every lunatic on-court combustion with great anticipation.
Women
******
Anastasia Myskina - Where to start... improbably, she's my all-time favourite player... perhaps in part because I've followed her career from such an early stage and watched her progress. Although she has a *major* case of Russian Head Trauma far too often of late for my frayed nerves to suffer; watching her look like a lost little girl while she destroys her game with hideous errors is painful viewing; I support her doggedly to the end. Often (I feel) unfairly represented by some negative news coverage (misinterpreted fed cup comments, etc,) she has continued to give a lot of time to good causes, fans and fellow players - even in the midst of 2005, where her game and family life often publicly unravelled. Her press conference after her 1st round loss at Roland Garros highlighted her dignity. I am, of course, a biased fan, but hey... the girl deserves some breaks
Martina Navratilova - Record speaks for itself and then some... superb player, great ambassador for gay sportsmen and women, unearthly athleticism, et al; praise, praise, praise, etc.
Arantxa Sanchez Vicario - The queen of the hustle! Frequently criticised for being (mostly) the dowdy bridesmaid, or merely the default challenger to Graf in a time of minimal depth to the women's game - I viewed her very differently. In my mind she stands out as a bright, sunny woman who made the very best of her talents and frequently found intelligent ways to win with comparatively limited weaponry. Hopefully history will appreciate her doubles and fed cup achievements in addition to the singles!
Martina Hingis - Ok... so Chucky is, perhaps, evil incarnate. But oh-so fascinating to watch! Prodigious technical talent without doubt, but it was her mind that I watched for (and thankfully, can do so once again) - the way she dissects her opponents and finds ways to mentally torture them is both cruel and brilliant. Also, if there is an award for "best" press conference quotes, she wins hands down. She will win another major (I vote the French) within 2-3 years IF she maintains the comeback and does not hide from the time and effort it will require from her.
Jenifer Capriati - My wildcard entry... can't put my finger on it, but there's an amazing, car-crash quality to her life and career that becomes compulsive. Not sure if she has another comeback left in her... but she's the sort of hard-headed creature that is capable in adversity. Hell, despite all the irate sulking, I like her a lot!
And there we go... I talk too much wink
B