I've since gotten my Vanguard to level six and enjoy it quite a bit; honestly, I think I feel a little more confident going into a match with it than an A-class. Still, going up against good A-class players is the thing that scares me the most. When I play Vanguard, I try to provide an anchor for the team, spearheading pushes and being at the forefront of defenses. In a team setting, I think I'm pretty okay with the mech, although I'm still not so crazy about engaging anything other than other C or B-classes in it. I think a large part of my development revolves around getting used to the grenade launcher and memorizing how far I need to lead to get good hits. Hitting flying 'zerkers and the like is a nightmare and I usually have to rely on some backup from the team if they come running.
I think that some of the C-classes just might cater a bit more to my playstyle than the A-class mechs I've been trying to get good at, but it's tough to tell; I've only used the Vanguard and to a much lesser extent the Rocketeer (can't stand it). So, what sort of advice do the veteran C-class aficionados have for aspiring fatties?