I like rolling under wisdom, because wisdom just doesn't do a whole lot otherwise, except for divine spellcasters.

Also, assuming you use the non-weapon proficiency rules from the PHB, it makes sense to add perception as an NWP, based on wisdom.

And yes, perception and comeliness where the most common "extra stats" that people houseruled in, based on the really old unofficial (banned-by-T$R) D&D handbooks on the web. I don't think comeliness actually does anything, but it was a common stat.