I see a lot of mentions of Namecheap in these comments, but I recently discovered another option on tld-list[1]: Porkbun[2]. I don't need much out of a registrar, so price is the main consideration, and Porkbun's renewal prices are significantly cheaper ($8.70 for a .com, versus $13.16 on Namecheap).
I would consider using Cloudflare's new at-cost registrar service[3] for everything, but they don't allow you to use non-Cloudflare nameservers.
I've also experienced strange issues with logging in to Namecheap. From what I remember, I kept getting a server error message. Sometimes it happened after submitting my password, and sometimes it happened after submitting my 2FA code. Customer support couldn't help, and the issue went away the next day.
I would consider using Cloudflare's new at-cost registrar service[3] for everything, but they don't allow you to use non-Cloudflare nameservers.
I've also experienced strange issues with logging in to Namecheap. From what I remember, I kept getting a server error message. Sometimes it happened after submitting my password, and sometimes it happened after submitting my 2FA code. Customer support couldn't help, and the issue went away the next day.
[1]: https://tld-list.com
[2]: https://porkbun.com
[3]: https://www.cloudflare.com/products/registrar/