Not really, people say "it depends" because it depends. It depends on the hardware specs of the server, what you're going to do with the server, how many users there will be, how often you plan on updating it or upgrading to a new OS, etc. There is no standard, there are only individual preferences.
Personally, I only use server-grade backend hardware (server mobo, server chassis/PS, ECC or ECC/Registered RAM, etc). Dual core or higher Xeon, 8+ GB RAM, solid state drive around 40-80GB, and a RAID (type and capacity depends on what I'll be doing with the server, usually either RAID 1, RAID 10, or RAID 6, in order from lowest to highest capacity/speed requirements). I usually do software RAID for 1 and 10, hardware RAID for 6. I set up a 1GB /boot partition on the SSD, and use the rest for /. I set up swap and /home on the RAID, then do the standard RAID tweaks and SSD tweaks (moving /tmp to RAM (tmpfs), changing I/O scheduler, etc). Most server mobos have two NICs, so I usually bond them for redundancy, etc.
But that's just me.
Last edited by suicidaleggroll; 01-18-2012 at 12:33 PM.