I agree with the idea of an objective, or several objectives while travelling, as Pat494 says.
Its a long time since my travels. First time I went was a relatively short trip -less than 6 months.
I found that hanging out on beaches and visiting temples and sights grew a bit dull, nice to do but same thing again and again..
Next time I went travelling I made sure I had some objectives. I worked, not because I needed the money (was not working my way...) but in order to meet the locals and interact and get an understanding of the countries I was in. It made one hell of a difference. A Much more satisfying and therefore longer trip. Also a few other objectives of mountains to climb, places to trek to, Try to go to these places with locals. Maybe stay with a local family a bit, learn their way of cooking. I still cook a mean curry after staying with a family in India, and thai's not bad either.
As D Toast has said many places are now part of a backpacker trail, kind of leads to the naive mixing with the naive all leading nowhere. (Koh Samui - I went back recently, around 25 yrs after first visiting, I wish I'd stayed away and left my memories intact. A relatively untouched paradise turned into tourist hell in some parts. But still I have good Thai friends there and was able to at least visit them stay in a few local places and eat home cooked thai food)
Step out of the norm there are loads of adventures to be had.
But Mr Gecko remember the 'travel experience' you mention, its not necesarily something that hits you big at that moment , but as I can now say, its great to have done the travelling had the experiences and have it as part of your ROM.
One thing I wonder though is, if you have to ask the question do you really want to go?