I had fun the moment I started playing. My problem is I don't like redoing things, so since I've done ARR, HW, and now SB, I tend to use boost potions every time I start a new character. The only partial exception is this character since I wanted an extra fantasia for Viera, so I played through to The Ultimate Weapon quest (and actually had fun with the story since it's been so long since I played ARR) before boosting to the end of SB and boosting to 70 since I've already played through it with previous characters.