LA and sniper(Infil) are probably the 2 most fun classes to play. Learn them and you can wtf own like others. Sniper(infil) has limited fighting locations as a lot of fighting is indoors/<50m and you will have to switch to smg and find a dark corner. But LA come on there is nothing more fun and you get C4 for those pesky tanks, not to mention using it on an ESF that tries to roadkill your maxes. Engineer is high simply because of vehicles, well and now AV turret. HA is simply high because of its versatility versus everything. (vehicle spam? = HA/Engie spam)) I think its more subconsious why people choose HA, they think WOH SHIELD, but its only worth 1-2 hits and your an easy headshot when its up. But being able to OHK rocket to the face i am sure draw a few. *Its also easier/safer to rocket vehicles than to rush them as LA, stealth atv with c4 on it is becoming more popular.