Rooting from KK or LP, does it matter?

[Pagaldesi4life]

Hello, my S5 is currently stock unrooted on KK 4.4.4 ANK7 and lately I've been thinking on rooting. However I have a concern if it matter whether you root from Kitkat or Lollipop? Meaning are there any differences that affect rooting depending on what version of Android you're coming from? If I take the LP ota update and then root, would I be able to flash KK roms or just LP roms?

 

[painiac]

Never, under any circumstances, take an OTA update. Once you take an upgrade to Lollipop, you're stuck with it forever. If you instead root KK and flash a safe Lollipop ROM that doesn't update the bootloader past BOD5, you can still downgrade to KK easily.

It's easier to stick with what you have, root it, and then flash a rooted Lollipop ROM. Lollipop is now rootable, but the root process is a little hit-or-miss. Rooting KK is painless.
I had success using this KK root method: http://forum.xda-developers.com/showthread.php?t=2784880

CAUTION: The BOD5 bootloader is the last one that will allow you to downgrade back to KK. If you ever flash anything that has a BOE1, BOG5, or BOK3 bootloader, you can never go back.
You won't use these for the KK root process, but you'll need them later so save them: you want to ONLY flash these latest safe kernels and/or firmwares by jrkruse: http://forum.xda-developers.com/showpost.php?p=64744448&postcount=2