Most beginners naturally revert to 1st, as they picture their MC in their head quite vividly so that they are pretending to be that person.
You either get that school, who tend to write very dull 'I woke up and went to school' stories, or the other school, who create vastly complex and flawed works in third person, normally set in an imaginary world- 'caress the detail'. Then it turns out that they don't have much of a plot either.
The POV I use depends on the story. If I think the story is about experience, I do it in 1st POV. The likelihood is that the story will be quite simple but the character's experience is the primary interest. However if I think the story is more about themes and plot, I write in third person, so I can give a more selective, 'broader' view.
For one of mine, I'm using third limited. This allows me to stay with my character and have the reader become emotionally attached; but I can also show the reader the MC's flaws and problems, which she is unlikely to think about or tell us.