I use a lot of paint in my art. Specifically acrylic paint.
Since I've used acrylic paint most of my art career, this is my main pick. However there are a few other reasons that I thought would be good to go over.
1. It's easy to clean up
When you are done with painting with acrylic, you just need to rinse your brush out with water and throw away your paper towels. (With oil paint, you have to rinse out your brushes and palate with mineral spirits. After the mineral spirits are too dirty to use any more, you pour them into a special metal container and dispose of them properly...because it's flammable. And anything you touch to clean up with it- aka: paper towels- has to be thrown away in another special container. And you can't pour the mineral spirits down the sink because it isn't good....and can combust)
2. Quick to dry
I can be impatient....especially when I am LITERALLY waiting for paint to dry. Acrylic paint dries in about 30 min and at most a few hours. After it's dry, I can collage or draw or even paint more on top. And I don't want to wait all day to do it! (Oil paint intrinsically takes longer to dry because it can go on thicker)
3. Cheaper than oil paint
As an artist, I go through a lot of paint. And if I can get the same look for cheaper, I'm all about it. (Oil paint is made a little different so it costs more. And mineral spirits cost more than just turning on your faucet)
But there are some that still really like oil paints because they like to mix them long after they squeeze the paint out of the tube. They also love them because you can apply oil paint in thin layers, like this artist uses in her work.
So now I get to introduce you to my secret stash that I use with my paints to give them these qualities.
Flow-aid helps the paint have a thinner appearance and I can achieve those thin layers that you can also get in oil paint.
Gel Medium builds up the paint and lets it get to be the same thickness as oil paint can tend to be (oil paint naturally usually goes on thicker than acrylic).
Retarder does just what it sounds like it does- it slows down the drying process.It doesn't slow it down the drying time of oil paint, but it definitely helps.
As I mentioned in the beginning, I'm an acrylic fan. And it does what I want it do. So if you're trying to figure out what the difference between acrylic paint and oil paint...there isn't much. And if you're a die-hard-oil-painter, I would encourage you to play with my secret stash with acrylics. You might even like them!