For this trip, as seems to be my way, I'm borderline between the weight allowance for carry on luggage. I think I could get it down to the (very strict) 7 kg limit except that I have to carry enough medication to last me for six months! That's a lot of medication -- and I've tried to get the idea across to my doctor that I need to limit my luggage but that's not working.
Anyway, it hit under the 7kg limit, I'd need to use a duffel bag while if I got with checked luggage, I can use a wheeled suitcase. No way in hell am I going the backpack route since I'm well out of my 20s (and I hate them). The duffel bag option means having two cross body bags (with my personal item) and that might drive me nuts.
On the other hand, I seem to have a resounding number of friends lately have their luggage lost en route.
So, let me know, are you a carry on only traveller or do you check your bags?