I always pack prepared. I got lost pretty bad as a kid one time on our ranch, and I read survival stories all the time so my mindset is always to be prepared.

I'm also usually the organizer/leader of trips and I'm often the most experience so I end up carrying a lot of "common" gear like navigation tools and first aid kits.

Also I usually have the best gear so I end up carrying filtration devices, stoves, etc. For some unknown reason I have issues with giving my gear to another person to carry, so I just pack it. There's probably a control issue there where I want to have everything I would need to stay alive on my back.

I've given out food and water to day hikers once... they tried doing a 10 mile loop and were pretty unprepared. The only thing I've ever requested from a stranger on a trail was an aspirin for a splitting headache, which they were happy to provide me with. Of course I now carry a selection of pharmaceuticals with me.