The feeling of being able to read your opponents that James described during the ARMs discussion is Yomi
The third eye. the greatest show of skill in a competitive video game, put head-to-head in a fighting game.
Yomi is a strange creature... in a game far too simple or without the pressure to force decisions, it is a sedate drug. it's seduction is much that of a child's first sip of Mike's hard lemonade that they stole from their parents' secret fridge in the garage where they keep the liquor.
Let me posit some metaphorical ideas to you, James Jones.
Imagine that feeling, of knowing what your opponent is going to do... but imagine in 5 or 6 levels deep. your opponent and you understand what you should do on the base level. your opponent knows what you should do to beat their strategy, but are ready to spring a trap on you when you apply the appropriate strategy... but you KNOW they are going to punish you for that, and you try something unexpected, but they've also are mentally on that level and maybe are ready to try something banannas too to try and stuff your attempts to avoid the forseen trap.
Now imagine that happening every few seconds, with your fingers going nuts, hammering the buttons in a rhytmic, practiced manner honed in the same sort of social enclosures that would make a samurai swing his sword in practice several times a day, knowing tomorrow might be his last.
THAT.
That is the intoxicating super heroin opioid numbing death that a Melee player feels. That is why Leffin refused to compete unless he had a GCN controller with the defect in the analogue stick that allowed him to to do quick turns at an effective level, because that's a tool important enough in his arsenal where he would need to reach deep down into that 5th-6th-7th tier of Yomi and pull out of his back of tricks to win a stock, to get a little hit of that amazing drug that is...
Smash Yomi.