I was replying to another post about quantity and mentioned a partner I had many years ago.
She started out only liking small quantities from a douche bulb syringe, but within a couple of years was at the other end of the spectrum, the E-Z-Em 2500cc "Super Set-Up" with the large diameter hose. She liked the bag hung high, would get in the knee-chest position, and take the 2500cc as fast as it would flow.
I tried it a few times, I liked the faster fill, but with her holding the bag modulating the height. Hung on the high hook on the door was a bit too much, too fast for me.
But what came next...
When we first started out enema play she was a bit shy if I stayed in the bathroom during expulsion, but now things had changed. She would sit on the edge of the tub, expelling in the tub, and wanted me to watch and comment. That went her wanting to be plugged, she was into cramps and urgency.
Where this went, for a while anyway might be over the top for some... using a piston syringe to inject what had just come out and do another enema.
From there we went to purchasing about a dozen small rubber balls, inserting them after the first enema. A lot less messy, and it turned out to be a lot more fun. She loved to do it over and over, she really got off on the sensation of more than water coming out.
She loved colon tubes, too, as I do. Imagine what she would be like with some of the silicone nozzle toys now!
An alternative was knee-chest in the tub and let it all fly, me in the tub with her... well shit washes off.
And those balls. the other thing she enjoyed, being filled with them, having sex, and leaving them in overnight.