Six in 10 Brits admit they take life too seriously, according to a study.
Researchers who polled 2,000 UK adults found most of us are so caught up in the hustle and bustle of daily life we're losing our sense of fun.
We're also less willing to let our hair down and try new things - two thirds admitted they're not spontaneous at all.
And three quarters of frustrated Brits said they don't say '˜yes' often enough and 59 per cent wish they more readily adopted a '˜why not?' outlook to life.
In fact, some of the most positive life experiences among those polled have happened as a direct result of being '˜more fun' '“ including meeting '˜the one' and making new friends.
Commissioned by Milkybar to celebrate its new reduced sugar chocolate bar, Milkybar Wowsomes, the research also found nearly half have a '˜glass half full' mind-set.
A spokesman for Milkybar said: 'As we get older, we take things more seriously, which sometimes means losing our spirit of adventure or sense of fun.
"New Milkybar Wowsomes contain 30 per cent less sugar than similar chocolate products, but we see no reason why they can't be 100 per cent as fun and delicious.'
The research also identified some of the UK's biggest '˜everyday regrets' '“ including questionable haircut choices, not travelling more widely when younger and accidentally reading TV spoilers.
Others wish they spent less time at work than they do, lament not starting a business and feel bad about joining the gym but never visiting it.
And some regret not having more hobbies, some wish they hadn't agreed to work late in coming days and some feel guilty about letting friends down recently.
Lending something to someone but subsequently fearing you won't ever get it back is another common '˜everyday regret.'
As is finding out a clothing item you've been eying up for a while is now sold out.
Amid this, 42 per cent feel burdened by their regrets and often think about what they would or should have done differently.
A spokesman for Milkybar said: 'Despite having regrets in the past, many of us have a glass half full approach to life and wish we'd said yes to more things.'
For more information about Milkybar Wowsomes click here.