I've read the guides and what does T/D means?

[Voca]

Does it mean my Tech score divided by Design? So if I get a 30 Tech 20 Design score, it means my T/D is 1.5?

If that is so, does it mean I should aim for the given T/D everytime (i.e 1.8 for Action), but with new record each time?

[Mr. Rain]

I think it's just Tech or Design or Tech and Design.
The points in themselves don't really matter (not from my play throughs and recent memory). So long as you have more points than your last game.

Your Action games in general will create more Tech points than design points and Adventure will create more Design than Tech. It's just a matter that it's more than your previous game, along with all the other factors that determine your overall game score.

[Voca]

You are right, as long as I set a new record, usually my ratings are decent or better.

Yet the guides seem to emphasize alot on balance which I do not quite get. So if certain genre are lopesided towards T or D, I gotta balance them out?

I've been bankrupt twice since I bought the game last night and am trying to figure this out.

P.S I am having a blast!

[Mr. Rain]

You don't have to worry about balancing the points. The way each genre are supposed to be "balanced" on the sliders, it tends to give certain genres more of 1 than the other.