I see the same questions being asked over and over on srk and fb junkies over the years. I'll work on this throughout the week and once its done JP can sticky it.
Q: Is x move hit confirmable?
A: It is said in Japan that 12 frames is the fastest a human can confirm a normal into a move. Ken's cr mk > jinrai is 12 frames. While this is the fastest possible, mastering this 100% is very unlikely, and therefore players use situational confirms when confirming difficult moves.
Q: What is a situational confirm?
A: A situational confirm is a hit confirm taking the scenario into consideration. These include confirming the stand/crouch animation, start up animation of a move, and recovery of a move. If you visually recognize that an opponent is standing while getting hit, you can assume all low moves will have hit them. The same is true with overheads and the crouch animation. Confirming the start up animation of a move simply means you see that the opponent has begun a move, and cannot guard. Confirming the recovery animation of a move simply means you are whiff punishing their move as they have not recovered from their move to guard.
Q: I play on pad/keyboard, should I switch?
A: Yes! This is not a matter of opinion but fact. It seems like in other games like sf4 there are successful pad players but I cannot think of a single strong player who uses pad or keyboard. 3rd strike is an arcade game, and not playing on stick restricts your ability to play on a cabinet. Also there are many things in the game that will be more difficult to execute on pad/keyboard.