That's the problem a lot of people have with Cryptic MMO's, there's not really anything massive about it. Another problem is they are more often than not rush job MMO's that look to cash in quickly with lifetime subs and micro transactions.
A lot of MMO players would tear you a new one if you said you prefer to solo most of the time, since they think grouping is dying out. A lot of MMO players are elitist retards though.
I like both the massive games and the others that let you play a lone for a while. I really liked Pirates of the Burning Sea since when you were doing a quest/mission you were taken to your own personal instance, but the world was a massive place where ports could be attacked by whole factions and the trading system was massive too. I've heard the ship combat in STO is somewhat similar to POTBS, so I'm tempted to try it out, but I just know I won't be playing it after a month after hearing some other reviews on the content.
