I definitely have a lot to learn. I'm just getting back into Hiking after years of... well I dunno - beer and fags I guess. However the last time I walked seriously was a winter trip around Dornie, but just day walking from a cottage. I carried all the emergency gear, harness, ropes etc for the group. My DAY-pack was 45 kilos. But as a super fit 19 year old that seemed quite light to me.
In my mid 30's now and I'm definitely learning a lot about lightweight gear from these forums. Already purchased a Montane Featherlite jacket for Snowdonia next month.