slow systems and the pace of enjoyment

Recently I have been rediscovering some springtime hobbies and have been surprised at my level of interest and my improving abilities in them. I've already mentioned carpentry, but this time it is gardening I mean. I'm starting to learn the proper names of plants and how they are best situated.
It struck me that these hobbies have a long gestation period, it takes time to gain the knowledge, especially in gardening, as the cycle is a full year or more for the plants to grow and flowers to form, then die. They comprise slow skills to learn, unlike many of the other aspects of life at the minute, which is very fickle. How many people will care about Beckham's sex life until the next time it is across the tabloids.
Photography is something else that I'd argue is a slow skill, you learn to control light to make pictures and so move from taking snapshots to creating pictures and become someone who regards themselves as a photographer.
Last year, Matt Jones asked about slow systems on his weblog, he got a range of responses, some of them were technology focused and some not
If he'd been able to ask about this a different forum, say The Guardian, then he might have been offered a range of different systems, from democracy to gardening.
Slow systems are more satisfying in many ways, a conversation over the Easter weekend was about jetskis, prompted by the noise of one whilst sitting on the beach at Brighton. I've been on one and throughly enjoyed the adrenaline rush of speed and excitement, but I think that long term it'd be quite dull.
My evidence for this is the continual pursuit of tricks and stunts across snow-boarding, skate-boarding etc. Mountain biking cross country vs "stunt", the younger you are then then more likely you are to do the tricks and stunts.
Maybe getting older makes you think more about the longer term enjoyment hobbies and less about the quick fixes. You do not necessarily stop doing the fast things, just do more of the slower things.
Slow things are deeply pleasurable, but maybe you need to be older to appreciate them, or at least clear of your twenties...