Beefing up positional aggression

[Invigilator]

I have been doing analysis using PT and have found that I am not particularly aggressive from specific positions. I would love to hear your thoughts on how you think about and apply selective agression from...

The Blinds
UTG
the Button.

(I seem to be playing well from middle positions)

Any thoughts really. I have read a number of books, but what do you like to raise with in these positions? Or, what special considerations are in your analysis when playing these positions specifically.

I realize that this is a very situational question. I am just looking for some input to jump start my thought process on this.
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If, despite my qualifying statements, this is just too general to address, I am sorry and I will go sit in the corner.