Katzenwolf, on 31 March 2014 - 11:50 AM, said:
then what House was known to use the Locusts or other Light mechs?
All of them used a healthy portion of lights. Back in the day, lights were the most common mechs on the battlefield. Bar none. Anymore, heavies and assaults are flat-out more popular among players, so fluff has adapted to reflect this (in both MWO and the table top). Just like originally, MechWarrior and Battletech had a very 'Mad Max' + 'Dune' like quality to its politics, and technology level (in many facets, actually). As time has gone on though, the flavor has shifted to a very high-tech, wealthy, advanced society. In some ways it’s a shame. In others, its improved.
Back to your question; you should pick your house from your own lineage. I’m German, Scottish, and Swedish. So, I could be a Northwind Highlander (Scottish), Steiner (German), or The Free Rasalhague Republic (Swedish). Of course the lineage of these houses is a little more complicated than this, but you can get a better idea reading up on the great houses of the Inner Sphere at sarna.net or from the source books themselves. I’m mostly Swedish (on both sides) so the FRR was a natural choice (for me). Good luck.