If you do one thing, then exfoliate… if you can spare the little bit extra, exfoliate and moisturise…
It really depends on your skin type, and how vigorously you exfoliate as to how important moisturising is… my skin can take it or leave it… but other may feel they benefit more from it, if you work in a air-conditioned office all day, or live in a cold climate etc…
You can over exfoliate, but you would notice it… the skin would be tender and almost raw… you don’t need to rub hard… just frequently… and if you want to indulge yourself, them moisturise as well…
As to what moisturiser, well. I think something simple and light, is best, and for males, well, unscented is also recommended… LOL You can try anything from aloe Vera fresh from your garden to a commercial preparation… something light and effective, and relatively cheap is Olay brand… there is one with and one without sunscreen…
Cheers,
David