I'm a huge grammar and spelling nerd, but there are some words I always spell wrong no matter what.
The 2 that come to mind are:
restaurant which I usually spell as resteraunt
definitely which I spell of variety of wrong ways like definitly defenitly definteley
im one of those people that always corrects people on their grammar or makes fun of people for it but i misspell a lot of words on purpose like
yes - ys
nice - nic
bye - by
indeed - imbeed/inded/imded
and for soem of my friend's names
vina - vine a
ryan - ryman