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.
Rand bursting out of the chest at Dumai's Wells
Elayne, Min, Avhiendha and Rand professing their love for each other in front of Nynaeve and Lan
Egwene's death
Many of the scenes between Ishamael / Moridin and Rand
Mat and Perrin finding our Rand is the Dragon Reborn