There are pretty much no unique limitations on most top level domains.

There are exceptions of course: to buy a .de domain you have to be a German citizen, similar restriction exists in a couple other countries.

There are pretty much only 2 factors in choosing a tld: how cool it looks, and how much does it cost.

I'd suggest a .xyz, you can get it under a dollar on Namecheap now and it looks kidna cool.

>>55302921
Thanks for the advice! I'll look into.xyz

Unless you have a good reason not to, it's best to stick with .com. It's the easiest to remember 99% of the time.

Of course it depends a lot on the market you're looking at. Young people don't mind weird domains as much, like last.fm. Older people can have trouble with them.

Go with .com unless you're really really set on a name that's already taken (which can confuse the average user easily if there's two sites with the same name but one's .com and the other is .org or whatever), or if you have a good idea that involves an alternate domain.

>>55301847
.com is probably best if you have a good name already.

If you want to use any other top level domain, you kind of have to work it into your branding. Last.fm is an example of this, as another anon mentioned, as is Twitch.tv. There are a ton of TLDs like .dog, .dentistry, .software, .ninja, even .meme is being released soon; here's a full list: https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains

But be aware that most of these cost more than a standard .com; up to 40 or 60 bucks a year as opposed to only 12.