Inside - we always do it ourselves. Outside, well we have a 2 storey house on the side of a hill. Some bits we are doing ourselves to save money as house painting can be really expensive, but anything that involves great heights will be a job for the professionals. No way am I risking the safety of my hubby or myself by getting many feet up a ladder on the side of a hill.
I would not attempt to paint the house or any part of it myself as I have a problem doing the ceiling, and also think it is far better if a professional does it.
So, I would not do it myself. Have just had it done and they are so fast and did such a good job.
I've always rented until just recently so I was never allowed to paint. Now I have my own home it hasn't needed painting yet but we will be painting it ourselves when it does. I was sort of tempted to paint a room a diffrent colour just because I could, after so long never being allowed to change anything, but I haven't really had time for that.
DIY last time we painted. It sure was a process. Hubby used to be a house painter, so it went faster than it would have. Think next time we need to paint, I'll leave it entirely up to him though, he was so much faster than me!