Monica,

Both styles of doors add a beautiful accent to any room. It’s really up to you to decide which one is a better fit for your home or the room the door will be located in and there is a few pros and cons that you can take into consideration. Just to give a few examples, sliding doors require less maintenance as weather stripping goes and it's much more easier to adjust them in comparison to French doors. Sliding doors work better when you have space opening restriction because of furniture, etc so they work better in tight spaces or smaller rooms.

If you have security concerns, French doors nowadays are made with a multi-locking system and they're more secured. The door opening is also wider on the french door and they have a much lower threshold in comparison to a sliding door. French doors are also more expensive but at the same time they offer that classic look to every room.

I hope this helps, Good luck

Over the years I've come to prefer french doors - mostly because I prefer that style (door handles in the middle, looking like actual door handles and not just a bar) - which is odd because inside I prefer pocket doors and hanging sliders.

I would like to disagree with Builders a little bit - you'll spend just as much for a quality sliding door as you do for a french door - there's just more "cheap" sliding doors on the market which are heavy to open. A quality sliding door you should be able to open with 1 or 2 fingers.