I have 5 accounts with 4 of my "Sisters" being on the same world. I did this to experience differant classes/Jobs and trades without having to worry about inventory space. I also did this because in the earlier stages of this game I found it very easy to run out of gil. Mobs didnt drop gil in dfs and we didnt have roulettes to pad our pocket books. I still play my other sister's but I dont cap tomes for all them.