It all depends....on your goals, needs, body, taste, your choice.
You can make all fruit, all vegetable or a combination.
Juicing filters out much of the fiber from the fruits and vegetables. What remains is the liquid, and the fibrous pulp is separated. Some juicer models allow you to control the amount of pulp that ends up in your drink. Some users discard the pulp, but I personally do not like to "waste" anything.
A smoothie is made by processing all of the ingredients together. The finished product includes the liquid AND all of the fiber.
Smoothies have a lot of fiber while juices have very little.
Do you want a thick slurpy drink or do you want pure liquid?
Do you peel the fruit and cut the skin BEFORE you juice? Or throw it all in.
It's up to you.
I personally use ALL of the fruit. And I add the leaves from the celery for example. You can always water it down or add ice if it is too chunky for you!
The lack of fiber in juices definitely gives them one advantage over smoothies. They serve up a lot more nutrients and offer a quick "kick". The drawback is that some juices contain a large amount of sugar from fruit, and lack the fiber to help digest it slowly.
I am sticking to the combo option. Give it a try and see what works for YOU!