Since i think this game is most similar to a borderlands type game i will compare my time to that... i have 250ish hours on destiny across all my characters, deleted and current. On borderlands 2 i had 200+ hours playtime just on one siren. That doesnt include my other 2 sirens or my 4 other characters that were max rank. This was over a long period of time of course but that should be one example how 100 hours isnt very much. Oh and i still have stuff i never finished on my siren but i dont feel like i am missing much on destiny after 100 hours let alone being 200 in Edit: portal could be in that list too. I spent lots of time in both the original and number 2 single and co-op