Personally I split my naming of mechs between Clan and IS mechs.
My Clan mechs are named after species of fishes (because I think that clan mechs default color is similar to that of many fishes) with some adjustments in order to sound more mech like:
MDD-A named 0P4H (Opah, the only warm-blooded fish, because build is VERY hot)
MDD-PRIME named RBW-TRT (Rainbow Trout, popular, good-looking, delicious, found in pretty much every market and shop)
ADR-A named 4B-TUN4 (Atlantic Bluefin Tuna, very expensive, tasty and very well known fish in general, mostly due to sushis made with it)
My IS mechs are named after more known cities in conflict zones, some letters replaced with numbers to add that mech feeling:
CN9-D named 4T4Q (Ataq, fairly small but extremely important city in Yemen, currently in control of the new Yemeni Government. Picked this name because with CN9-D i may look like weak, small and unimportant target,but can harass oppnents team very well with effective peek-a-boos, shielding and zombie tactics)
CN9-A(C) named 4RR4QQ4H (ar-Raqqah, heartland of Islamic State, suffers a lot from air raids however stands defiant and unwavering, named mech like this because it uses the legendary 2XML+3XSRM zombie build being able to endure inconceivable amounts of punishment as a medium mech)
DRG-1N named U84R1 (Ubari, town in an oasis, not that long ago came under control of Berber and Tuareg militias during current war in Libya, named mech like this because I use it as sort of shock troop, being able to appear out of nowhere, deal significant damage with AC/5s and lasers and kill opponent before he even understood what is happening, my favourite mech)
Edited by 800, 07 June 2015 - 08:29 AM.