Looking for something specific (can be multiple things), so not like the "Last Battle" or "Dumai's Well". For me:
The eerie'ness of the Fades in EotW. That feeling of the first time Rand saw the Fades really hooked me on the series.
Ashamen making people explode at Dumai's Well.....just a wow factor to that!
Rand making the Aes Sedai kneel and vow loyalty to him.
Those scenes always seem to stick in my mind.
In no particular order:
Lan admitting his love for Nynaeve
Mat's duel with Couladin
Egwene punching the Sul'dam after she is freed
Lanfear losing her shit on the docks
Nynaeve overcoming her block
Perrin and Faile tumbling down the stairs of the Winespring Inn
Moiraine balefiring Be'lal
Semirhage torturing Cabriana
Eben realizing what Aran'gar was up to at the Cleansing
Rand giving Morr poison