Choosing bike features - seat

Comfort bike's seat, with seat post shock absorber

If your rides will be short but bumpy, you might prefer a seat with a seat post shock absorber and lots of padding.
Otherwise, a hard seat is actually better.

Ideally the seat (sometimes called a saddle) will be tiltable so the front point can be angled more up or down, as you prefer.

Usually, you should prefer a hard seat with no seat post shock. I've seen claims that springs and cushioning will dissipate some of your pedaling efforts and also create chafing. So "comfort" seats are not always the most comfortable. The standard hard bicycle seat is made hard for good reasons. During your first few rides on a hard saddle, you might experience some discomfort even with a properly adjusted seat.

You can buy saddles designed for men, as well as female-specific ones.

If you buy a used bike, you can always buy a different seat later. The seat is not an important reason for rejecting an otherwise superior bike. You could just live with whatever seat is already on the bike, and change it if you feel the need.

If you buy a new bike from a retail bike shop, they should let you try different seats on the bike you want to buy. Getting a really good fit ought to be one of the benefits of buying from a local bike specialist.

For more details, check this page.