hmm..the gym structure N concept looks cool to me...
what i don't like about it is that,you know the purple bar thingi near the doors,i don't know what its purpose of being there..it kinda like ruin the building itself..
and the roof looks like it does not look good together with the main building..it looks kinda too big...
and the outer layer,if i am not mistaken,you want to make it look facing downwards but imo,it looks flat and like just a extra layer of the roof...
another thing is the pallete,its too dark imo,maybe lightened it up abit..
I hope you are not pissed by this..i hope you can work on them..i will comment on the pc and the house later on..
Your Pc Friend,
Ace Phantom