See this look?
mattpam-1.jpg and also this look?
Men_Cats-7.jpg
That is what one,single studio type flash looks like when bounced off of a ceiling. See how "hot" the light is at the top of the frame, and then how rapidly the white-white on the walls drops in intensity? That's what it looks like if you fire a studio flash, or other very powerful flash, at the ceiling in a smallish room. If the light is pretty close to the ceiling, it can give that very rapid fall-off, which I think looks substandard.
The rest of the shots look like a medium-sized umbrella is set up and is creating the majority of the light. Something like a 43-inch umbrella would work.
Bounced flash, fired off of a wall, or a ceiling, or a corner of a ceiling, or the wall/ceiling juncture, can be used to pretty good effect with a little practice. In the shots with windows in the background, the shutter needs to be set to give the right degree of brightness to the windows and the outdoor lighting. The FLASH exposure is determined by the power of the flash burst, and the ISO setting used; the shutter does not "make" the flash exposure; the shutter only "makes" the exposure for things that the flash does not hit or reach.
Indoors, using bounce flash, it might be helpful to use an ISO of 400,or 500, or even 640, maybe even 800 ISO if the flash you have is not all that powerful. If the flash is being bounced off of the ceiling or wall, it can be left in the hotshoe, and the flash head zoomed to a pretty telephoto length, and then aimed so that the flash will get a good bounce off of the interior, so as to light the scene in a nice way.