Sane; clear-thinking. / Decent; morally upright.

Alternative spelling of narrow-minded

Lacking subtlety or sophistication. / Lacking mental capacity; feeble-minded.

unreceptive to new ideas or information; not open to any agreement.

solemn

Alternative spelling of woolly-minded

(possibly offensive) Alternative form of woolly-headed: characterized by vague or confused thinking, dull-witted.

Having equanimity.

Absent-minded; distracted; being of less than sound mind; mentally despondent; touched. / Mentally unstable or insane; crazy.

Up-beat; positive; progressive.