yeah i wouldn't worry about min/maxing at all, just do whatever tickles your pickle. Its not like MMOs where one class is very tanky and one is very healer-y. Warlocks are in the best spot PVE right now with titans like 0.1% behind them, hunters are pretty good but don't give any group buffs like the other two. In PVP classes don't really matter that much, its about rolling together as a team ball and getting team shot kills and the weapons you use, you will use your super power maybe once or twice a match max.
The only things to remember while leveling are: accept the final exotic engram zavala gives you (its the very final step of the main campaign story) but don't decode it at rahool until your light is 265+. Bank 5 scout rifles (green/blue doesn't matter) in your vault for disassembly later during the MIDA multitool quest you get from the Gunsmith. Join a clan before you even start playing so you get all the clan benefits invisibly.
You can technically easily hit 280 light this week just by leveling, then doing public events, then doing the 3 exotic quest planet quests, decoding your zavala engram, and doing all your power engram weeklies (in any order really). Then next week you can easily go in the raid at 280, get some loot, do your power engrams, and hit 290-295. Rinse and repeat for another 2 weeks and you'll cap out at 305 and be done. It goes even faster when you repeat it on your 2 alts since you are raining new weapons down on yourself and weapons weigh heavier on your light level than armor.
Your third alt ends up being the highest light level usually since he gets the benefit of the weapons from the other two so most people are leveling their chars in this way: hunter first, titan second, warlock third (or warlock/titan, depending on which class you really like more). Warlock jumps suck (but only class with blink which is OPAF) and titans move very cool and their arc grenade is insanely OP but otherwise the classes are not that different.
