The hobbies take too long to level up at later levels. I know the point of the game is to keep having something to work on/level up but if you set your system clock ahead(just testing this, it is a beta) once all your hobbies are around level 30 it take over 62k hours to level up. There 8760 hours in a year, so I hope you can see a problem with this. Some of the girls require 40 to 60 in a particular hobby. This is not possible in my lifetime if I were to play for real even with the current multipliers.
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All placeholder numbers til we can sit down and balance the game XD Sorry it's a couple lifetimes to complete in its current form