I've punted across Europe, US and a lot of Asia but my experiences are skewed by my fetish for huge natural tits which puts places like BKK near the bottom of the pile.
The US is a pain in the arse and bloody expensive, primarily due to the legality of punting over there. Once you've seen a girl over there, keep her details for a referral to speed up the next booking and avoid the middleman agents.
Japan's a pain in the arse if you don't speak the lingo, luckily I found a girl who could translate for me and arranged for me to meet one of my favourite JAV stars. She was reasonably pricey but worth it to tick her off the bucket list. The soapland scene was interesting and felt like I was being pampered at a day spa, even the Japanese guys that work at these places bow down to you as you're making your way up the stairs to your soapy session. Much different to the cold "you come now" service typical of the Romanians over here.
The big cities in China are a bit of a rip off, especially Shanghai if you're not initiated in the scene over there. Plus most of the bar girls are Thai or Vietnamese. Hong Kong is actually pretty damn good, lots of variety unless you're after African girls as they seem to be quite rare and can sometimes command a premium. The only downsides with HK is that the punt is usually based on a cum basis, irrespective of time booked for.
Bangkok is a bit of a tourist trip crapshoot, will occasionally find some gems, if you've got yellow fever then you'll fit in with the rest of the sexpats although the prettiest looking girls are reserving themselves for the Japanese guys nowadays (they tend to treat them like a girlfriend whereas all other guys treat them like a flesh and blood sex doll).
Europe generally speaking is expensive compared to the UK with the exception of some places like Poland. Prague is no longer a haven for cheap Euro pussy, plus most of the sauna girls are Romanian anyway. Likewise Germany only more expensive, did have some memorable punts with the polish girls there but they are being phased out by the influx of cheaper Romanians. Germany is pretty damn good for huge natural tits, particularly Polish or Ukrainians, I'm assuming the best talents go to Germany as the money is better over there compared to home.
Amsterdam is a fucking rip off, especially compared to London, and most of the girls are silicone pumped up entitled cows who expect you to pay shit loads and buy in for long time before offering anything resembling an intimate session. Pure pump and dump of the most boring order.
As a general rule, you get decent enough value here in the U.K whether you're expecting a pump and dump or an intimate GFE and you get service providers that cover a wide spectrum of services and performance.
The fact that on Euro escort girls the UK has more listings then the rest of the world combined says it all really about what a punting paradise this island is. The only downside is that the talent pool can be a bit limited i.e always the same nationalities, body types etc etc.
I think the rise in low paying jobs has seen an increase in British women taking up escort work from across the age spectrum which offsets the miserable (potentially trafficked) Romanian crowd.