Until I visited Myanmar (Burma), very little.
My dislike can probably be summed up as the behaviour of other tourist /travel photographers towards the locals.
Myanmar is an amazing place and having just opened its doors to tourism the locals are still very friendly towards foreigners. They really are the nicest people I've ever met.
Unfortunately the behaviour of some photographers here is atrocious.
I'll give a handful of examples..
While visiting the holiest Pagoda in Yangon a lady was walking around with a wide angle zoom. A Burmese Pilgrim was lost in prayer in front of the main stupa. The lady proceeded to wander over, put the wide angle zoom centimetres from her face, then snap away for a couple of minutes. Looking around a few other toggers were showing the same amount of disregard. After all, this is all just set up for them, right? That's why the Pagoda was built hundreds of years ago, so package photographers could get 'that shot'.
At the same Pagoda a man was lighting candles, in broken Burmese I asked him if I could take his photo (it's one of the first things I learn when visiting a new country on our year tour). I popped in the 75mm, positioned myself a little way away, but could only rattle off a couple of frames before 10 other toggers spotted the 'photo op' and barged in my life of sight...
We left the Pagoda pretty quickly that day.
Yesterday while on U Bein Bridge a couple of monks stopped us to practice English. We were invited back to their Monastery for a look around. What we didn't know is the monastery is Burma 2nd largest, oh and the monks eating lunch has been changed into a monkey show for tourist toggers. Around 500 photographers showed up barging around for the best shot, not taking off their shoes, and showing zero respect for the monks. Really sad to see. Imagine a celebrity surrounded by paparazzi then ask how you would feel if that to you every day in the work canteen...
I could go on but maybe you get the drift.
If your a travel photographer then please don't be an asshole, respect the locals and ask permission. Where you can't ask for permission then be as unobtrusive as possible.
Personally I thought an influx of Gap Yah kids would kill Burma, now I think it's the toggers!