MK1 was cool for its looks, and fun... but, it was way too limited.
MK2 was too cartoony for my taste, but it did have some nice new characters.
SF IIce was cool for its time, but eventually, the game wore thin over time.
MK3 was more fun than above, because of the combo system, speed of the game,
and humorous violence. SFII was like a Disney childs game comparatively.
Killer Instinct 1 - Probably my alltime Favorite. The depth is greater than
most all other fighters combined. The combo system is nearly limitless to your
imagination. You can probably make 100 possible combos per character.
Combine 3 types of specials, with several linkers, and 3 or so enders.
Does not stop there... Each ender can be pre-held, and then released...
which creates a faster more damaging. More? You can make "Broken-Combos",
by stringing specials and regular attacks together. These are unbreakable, but
very difficult to string together well.
Combo Breaker system! Unlike most fighters, you Can break out of a combo,
but it takes a lot of skill. You have to preform the correct special move, with
the correct button. One in Three chance, but, if you are aware of the moves
being done to you, you will know which button to use.
Breaker Rewards: If you break a combo, you get special powers. One, is
a Shadow power attack. Many of your special moves will go further, are twice as
fast, have a cool shadow trail effect behind you, do more damages. Also,
when you do hold and release moves, you make a high damage shadow combo.
Some characters who shoot projectiles, may get 3x the projectiles instead
of a single.
Stun / Dizzy: Certain levels of damage will cause the Opp to be stunned. Yet,
they can snap out of it if they wiggle the stick fast enough.
Ultra Combo: If the Opps is almost dead, you can add a move to your combo
to preform a very long unbreakable ultra combo.
Last Chance: If you run out of life, yet snap out of it due to the opp waiting too
long, ...you are more dangerous, as all your moves do more damages.
The next Fav in line would be Tekken III. However, Tekken 3 is a tad clunky
in its execution.