I look at this a little differently. For me, value for money is always defined by:
a) can I afford it
b) did it adequately provide me with a "good time".
I always work on my cinema system. I love the cinema, and love seeing films on the big screen.
It's about £8 now to see a film which will last about 2 hours. Even if the film is bad (I do tend to be picky though so it's rare), I still enjoy the experience.
So at that base rate, I always say that for me, a good time is worth £4 an hour (
). That's for something I enjoy doing. It's not often a mind blowing experience, and it's rarely a dull experience for me, just "time well spent".
I also enjoy time at Theme Parks. By the above system, if I spend 5 hours at a park for £20, then it's value for money.
It's also time at parks I'm happy with, rides and entertainment don't come massively into it. As long as I've finished the day having had a good time, then that park will stick as "value for money".
It's different if it's me on my own, or going with the family though. It costs four times as much to take family_furie, but the chances of having a good day are improved as you get a lot more out of a park with the family.
Good example is Drayton Manor. It's superb for the family_furie and we always have an excellent time. When I meet with friends and do the "enthusiast" thing, I find it hard to enjoy the place too much and end up doing a Thorpe, just sitting around a bit bored.
Different company helps obviously, and it's essential to be with the right people to make the day go well. I'll always look though and check the price, per hours spent there and roughly work out if it will be value for money on my scale.
This makes Annual Pass days at parks superb value... Even if you have to pay for parking...
As an extra... It's rarely the cost of the park that is the major outlay for me. You can always get cheap tickets and the like to bring down costs, take picnics, etc. For me, the biggest cost tends to be travel and "out of park" food. If we stop at a hotel too, it adds on a fair amount.
Example here would be Paultons Park. I think it's about £60 for the family_Furie to get in. To do as a day trip:
1. we'd stop for breakfast on the way down (early start so none at home) - £15 (all in)
2. Petrol 340 miles @ 18p/mile - £61.20
3. Dinner on the way home - £20 all in.
So while Paultons for me is well worth the value of entry, the external costs more than double that and make it a much harder sell