I'll start with some that always make me laugh:
J0ngg
Textile
Zellshit
Diamond1
n1cf [#15]am i dumb for geniunely laughing to this
nah I also laughed the first time I saw it kkkkkk
mEXsACHINE [#12]s3xture
No Access To Site is also a pretty insane nickname for nAts
That Nats one is underrated holeee