[maxisaibot]

-linux
Arch Linux 2018 (autoinstaller, latest version) (64bits)
CentOS 6 + SolusVM OpenVZ (Master) (64bits)
CentOS 6 + SolusVM OpenVZ (Slave) (64bits)
CentOS 6.9 (64bits)
CentOS 7.4.1708 (64bits)
Citrix XenServer 6.5 (64bits)
Citrix XenServer 7.0.0 (BETA) (no SoftRAID) (64bits)
CloudLinux 6.5 (64bits)
CloudLinux 7.1 (64bits)
CoreOS (stable branch) (NO SOFTRAID) (64bits)
CoreOS-alpha (ALPHA) (NO SOFTRAID) (64bits)
Cpanel 11.68 autoinstaller (CentOS 6 64bit) (64bits)
Cpanel 11.68 autoinstaller (CentOS 7 64bit) (64bits)
Debian 7.10 (Wheezy) (Oldoldstable) (EOL 2018-05-31) (64bits)
Debian 8.10 (Jessie) (oldstable) (64bits)
Debian 9.3 Stretch (stable) (64bits)
DirectAdmin (CentOS 7) (64bits)
Fedora 26 Server (64bits)
Fedora 27 Server (64bits)
Gentoo 2018 (latest version via autoinstaller) (64bits)
ISPconfig 3.0.5.4 (Debian (64bits)
ISPconfig 3.0.5.4 (Debian 9) (64bits)
Linux Plesk 12 (CentOS 6) (64bits)
Linux Plesk 12 (CentOS 7) (64bits)
Linux Plesk 12.5 (CentOS 7) (64bits)
Linux Plesk 12.5 (Debian 8 "Jessie") (64bits)
Linux Plesk 12.5 (Ubuntu 14.04 LTS) (64bits)
Linux Plesk Onyx (CentOS 7) (64bits)
OpenSUSE 42 (64bits)
OVH Release 3 (CentOS 6) (EOL: 12/2017) (64bits)
Slackware 14 (64bits)
Ubuntu Server 14.04 "Trusty Tahr" LTS (64bits)
Ubuntu Server 16.04 "Xenial Xerus" LTS (64bits)
Ubuntu Server 17.10 "Artful Aardvark" (64bits)
VPS Proxmox VE 4 (64bits)
VPS Proxmox VE 4.4 (ZFS) (64bits)
VPS Proxmox VE 5 (64bits)
VPS Proxmox VE 5 (ZFS) (BETA) (64bits)
Xubuntu Desktop 16.04 "Xenial Xerus" (XFCE + x2go) (64bits)

- solaris
Joyent SmartOS (Beta) (build 20180203T031130Z) (64bits)

- windows
Windows Client 8.1 PRO 64bits (InstallV2) (64bits)

[Sithis]

Go with whatever OS you are comfortable with. SA-MP on Linux is a good choice if you are able to use the command line. Ubuntu LTS is a good choice if you are new to Linux since it's stable, well documented and reasonably user-friendly.

[Astralis]

Ubuntu, Debian, CentOS, it all depends on you. It doesn't matter which one, it matters how YOU are able to use it.