I have the annual pass and there's enough soloable content if you don't enjoy group activities. I have it and like the quests to unlock new guns and their accompanying lore. I'm also a die hard carryover from Destiny 1 but I have way less time to play now.
Strikes and anything that can be done in duo or maybe trio is good.
Don't really pay attention to lore though. Never been a fan of reading "codexes" and such, interesting lore should come from quests and dialogue.
EDIT Didn't have chance to finish this really, strike started. As for AP gear, is there anything good? Because i feel like i can't really get any better gear. What's better than Skull of Dire Ahamkara for Void Warlock? Or Crown of Tempest for Arc Warlock? Or better than Sunbracers...
And weapons. Got all Ikelos weapons, and ever since i got Thunderlord, all other exotics have been wasting away. Before that, i stuck mostly with Riskrunner because it was easy to keep going and was ridiculously good.
Don't care for snipers or handcannons, require too much care, i'm more of a melee/in-you-face type of player anyhow.