to be fair i do carry a fair amount of kit around and thats because in the past i used to work as a mountain bike leader for Lancashire County Council.
during that time the number of poorly maintained bikes that kids used to bring along on rides was unbelievable as was the rate of failure and it was always up to me to carry out the trailside fixes to get them up and running again.
half the tools i carry arent even to fix my own bike but to make sure the other bikes keep going
i carry a lot of lever as i have a habit of losing them. the allen keys have simply accumulated over time, i carry lots of patches as i used to suffera lot of punctures on my commute due to the crap but fast semi slicks i had on my old hardtail.
the blackburn pump is now 10 years old and still working perfectly
the bb tool was only there as i took it along to fit a bb for a friend before a ride and i've not got round to putting it back in the toolbox