Just completed the game on hard difficulty with Q.

Jesus. It took me 2hrs and 30mins on Sega Dreamcast. After the first 8 challengers, Ken was the first to stump me. After coming to the conclusion of usinging the turtling techiniqe instead, I defeated him. Akuma took most of the time defeating. But you gotta love his teleportation = instant throw-down.

Ahh. At last, Gil - not much of a challenge since his recovery segment can be easily broken with Q's dash attack. Here are the stats I used

Character: Q
Costume: LP (Pimpin' White)
Difficulty: *******(hard)
Super Arts: Deadly Double Combination

Besides that, I have been practicing with Oro as my primary. Although, I still need to become more aggresiive on my throws.