Elo in this game is segregated by weight class, as it probably should be. See: pilot is good with lights but not assaults, etc. Where this causes problems though is when you bring a group of friends with very different Elos together and have them all play together.
No one wants to feel pressured to play mechs they're not as fond of or simply not very good with just because they're now playing with other people, yet I find myself playing my favorite mech so much less these days for two reasons: The dumb sniping meta, and to at least try to make matches a little more fair.
At higher elos medium mechs are... uncommon we'll say. You'll find the occasional cent or hunchback (I don't count the Cic as a medium because it plays far more like a light). However most of my friends first (and often only) mechs are mediums. This seems to play hell with matchmaking and we often find a team with 3-4 mediums (my friends) and another lance of assaults/heavies fighting a mostly poptart team, or other weird unmatched combination. I've noticed though, that when I play lights or assaults (which I rarely play) that matches tend to be far more balanced, with fewer poptarts. And those that are usually aren't a problem because they're not very good. So why not just always play <insert less used weight classes> when playing with my friends? Because I feel I shouldn't have to. I don't dislike either weight class really, but I don't want to feel like I can only play my favorite mechs solo (bleh pugging), or in a group with other players at more my skill level who may not be around most nights.
The other reason I've been.. encouraged to diversify is because my favorite mech is disadvantaged to say the least. The cat C1 is a great mech to build a balanced, mixed loadout around. It makes a poor boat but can run a loadout like a mini Timberwolf (it just tries so hard :3). BUT, when the other team is composed mostly of PPC boats and poptarting highlanders the massive one-shotable cockpit and prominent CT become such huge liabilities that I find myself driving while looking out the side window rather frequently. Is this a problem with the mech? Nah, not really. But having over half the enemy team (as well as your team) being poptarts blows. So for now I'm branching back out into mediums where I don't have to worry as much about the PPC hellscape that the higher Elos have become. Sadly, it's just more fun that way.
TL;DR: I don't like having to forsake my favorite and best chassis/weight class just to play with friends lest they die in mechs ill-suited to the current meta (mostly hunchbacks and cents) by fighting higher elo opponents who run an increasing amount of poptarts. >:C
Edited by Tor6, 08 May 2013 - 11:58 AM.