While I love emptying a really full bladder that I've been holding for a bit (never that long as it can be harmful to hold it too long) especially if I am able to relax enough that the pipes are all open with a consistent flow but also in control enough that the flow is long and slow, it can be quite blissful.
I also really enjoy when I am just letting out little bursts every 15-20 minutes, laying back at home relaxed, chilled and trying to keep the pelvic floor relaxed and outer sphincter open (the one that is under control of conscious thought) so that as soon as there is more than a dribble in the bladder it just trickles out, This may not give the same blissful feeling of release that a really full bladder does but feels much more natural and like I am really making the best use of the nappy.
More so is the fact that wetting this way gives the SAP and fibres more time to absorb fully and wick it all around, I've had nappies wet this way that feel much fuller and have taken much more in than the same brand that has taken full bladder floods. for example a Tena Slip super for me can take one big flood and then one or two dribbles later on before I feel it getting leaky and ends up weighting about 950-1000 garms but same nappy wet in tiny amounts over a whole afternoon/evening will keep going and going before it feels leaky and end up weighing 1300-1500+ grams.
So yeah for a quick fix of dopamine hold it for a bit and flood in one go, for a more relaxed, comfortable and really full nappy feeling then slowly over the course of a few hours. If I had to pick one only it would be slower small amounts more often often.