No. I must be the lightest packer in the world! I took an on board bag only for a three week trip to the Caribbean. It's mostly because I hate having to relocate my luggage several times to get it through customs, that and I don't need that many clothing options. It's also nice to buy clothes when I travel so that I come back with interesting items that are unique, so usually I have a bit more luggage on the return journey.
I am an avid traveller and you would think I would have learnt by now!! I do over pack and I always regret it when I get back. It is so hard, especially when you are travelling for over a month, you need to be prepared no matter where you are!!