This is such a strange question for this forum, I don't know what makes you think that existence has been enjoyable and worth enduring for everyone, I bet that if people felt in such a way they wouldn't be on this site and wanting to ctb. Existence could never be a desirable state to me, it's so dreadful and futile, I don't get why people are on this site if they supposedly enjoy existing so much, existence could never be worth enduring to me no matter what, I've only ever wished for perfect non-existence free from everything.
You have a very specific way of experiencing life. I suppose we all do in a way. Ideation though can affect people who- up until that point have enjoyed their lives. Some people who still DO enjoy aspects of life still have the realisation that their entire life isn't sustainable ie. the bad outweighs the good. Just because someone enjoys something- it doesn't make them a pro-lifer. It doesn't make their wish to die any less real or intense.
I do feel bad for how you feel. I've come to realise that the tiniest amount of positivity here triggers you and for you- it seems to invalidate that persons suffering ie. if you like one tiny aspect of life- you can't be suicidal.
The last thing I want to do is make you feel issolated but I hesitate to suggest that your experience of life isn't typical- not even for people here. I've read your posts for a long time now and it seems like you don't have even one single reasonably happy memory in life. Or, where you are now- you refuse to accept that you've ever enjoyed anything in your past. I'd say the majority of people can recall at least one thing they enjoyed. So- while I agree- this may be a little upbeat for this part of the forum- I wouldn't say it's an unreasonable question.
Sorry- I didn't mean to be unkind saying all that. I guess I just wanted to point out that ideation takes many forms because we are all different. It isn't only valid if you are utterly miserable 24/7 and have been forever. So- a public forum like this (in my view) is bound also to reflect people with varying experiences- some of those will be the want for positive experiences before death.
With regards to the original question- As for me- maybe one of my happiest memories was snorkling. If you like nature and the sea that is- it's incredible to be immersed in a totally alien world. If you've got the money and the ability/energy- I'd say maybe travel to somewhere you've always wanted to see. I think that's what I would want to do- maybe not as exotic as an overseas holiday but there are a few places in my resident country I would love to see and say goodbye to.