I always play at eye level but angles are indeed everything.
when I sit off to the left or right, my hitting is atrocious.
doesn't seem to affect my pitching though.
when I'm not aligned, I'm Mario Mendoza but with correct alignment I'm,
well, I'm never Ted Williams, but I'm also no longer Mendoza either.
the only reason I sit off to the left or right is for comfort/ convenience.
but when it comes time to get down to brass tacks & the game hangs in the balance, I'm front & center.
maybe I'd eventually get used to an off-center alignment but since realignment is easier & simple
(and more palatable than losing) I just sit up and take notice