Drool... that is a kick ass monitor you've got there. 100% perfect for your Amiga's needs.Sony PVM monitor
The whole NTSC/PAL issue used to drive me batty, too. And I don't want to go too far into the aspect ratio stuff (Shot covered it perfectly already) but as a designer I couldn't stand going to other sites and seeing US-made/NTSC games displayed vertically squashed. And these are sites - well-meaning sites - that are being pointed to as shrines of history.
And that broke my heart.
To see someone's work like Jim Sachs' with squashed heads... That's a large part of what convinced me to take the plunge and start my (albeit tiny) Games Library here at AmigaLove.com. It's also why most of the games in the Library show actual photographs of my CRT screens rather than straight up pixels from the original source. Not only did I want to capture the correct aspect ratios, I wanted to show the color blooms and scan-lines the way gamers (and the original designers) saw the games back in the day. They weren't perfectly crisp blocky games - Many were impossibly detailed thanks to the very nature of the hardware outputs common at the time.
Now, on the games I review I don't list NTSC/PAL. What I list is the original source for the game - e.g. USA, UK, Germany, Japan, etc.
And at least right now, over 90% of what I've been reviewing originated in the USA, which means for most practical purposes you're looking at NTSC screens on most of what you might find in there. I did that because, like Shot said, some popular games were created in both formats. So listing "NTSC" or "PAL" next to a game would only make sense if it was relevant to a download found also on the page somewhere.
The one place I've run into the most confusion (especially in the beginning) was with arcade ports. Nearly all of the games originated in Japan or the US, but many of the ports were made in the UK. And, unfortunately due to the reality of economics, many of those ports were rushed to market putting the designers and developers under completely unreasonable expectations. As such, the games were often PAL only and, well, pretty crappy.
Couple final thoughts on this interesting topic.
When it comes to games specifically, and I'm talking about compatibility, my personal experience is OS1.3 is the most compatible OS across the board. This reality falls off the table once you go beyond 1993 or so. But not really the OS, more on the regional NTSC/PAL side of things. By 1993, a lot of US companies had started to move on and a lot of the software being pushed out was produced and aimed at the European market. Most of my personal focus is 1992 and earlier with a few exceptions.
And since the European market lasted longer (and some might argue began later) you see most of the demos these days being coded by talented and devoted Europeans on and for PAL hardware.
So whether it's owning one of each type of machine, or installing a switch - either is a great option if you want to experience it all, which it sounds like you do. Which is awesome!