was never a fan of Virtua Fighter on any platform, always felt it was clunky and non intuitive as far as the controls were concerned.
DOA is a sodding joke as far as the fighting genre is concerned, extremely disappointing as this comes from the team responsible for the unbelievably amazing Ninja Gaiden (i like this game!).
Tekken has had my heart since the first incarnation however, fluid controls, quality storylines for each character, excellent and even halfway believable special moves, beautiful arenas and perhaps while lacking the ring out and level switching effects (kicking them through windows etc), i find that it provides the most challenging fights with no getout clauses.
As far as the online feasability of these, i can't see it happening anytime soon. Reversal moves, split second blocking and riposting, carefully timed sidestepping and power moves would all be affected far too much by lag/latency/ping, and people DCing when losing etc. As was mentioned earlier, theres nothing quite like gloating after beating your mate senseless for the 15th time in a row.
my tuppence worth