Hello again, 
I'm still trying to find out why emacs doesn't pick up MINTED instead of LISTINGS to handle code blocks when exporting files from .org to .pdf, via .tex.

I backed-up my previous .emacs file (which had a lot of customization for Beamer, AUCTeX etc.), loaded Nick Dokos' minimal init file, restarted emacs then tried exporting a minimal working example (MWE) of an Org file. IT WORKS!!! (Even though the background color is Black and I'd like it to be White!)

I've tried exporting a more complicated Org file and it works too! (Albeit with a dark background that makes it hard to read some lines).

Now the question is how do I integrate these lines in my old .emacs file so that I can keep all other modes' settings AND export code flawlessly from Org mode?

This is the result of `C-h v org-latex-listings' variable given while .emacs file was open. In truth, this was its value also a couple of days ago, with my old .emacs file active.

------------------------------------------------------------------
org-latex-listings is a variable defined in `ox-latex.el'.
Its value is minted
Original value was nil
------------------------------------------------------------------

Here's the very simple MWE of an Org file:
------------------------------------------------------------
#+TITLE: My Minted Experiment
#+AUTHOR: me
#+DATE: 
#+STARTUP: nolatexpreview
#+OPTIONS: toc:nil
#+LATEX_CLASS: article
#+LATEX_CLASS_OPTIONS: [a4paper,10pt]
#+ATTR_LATEX: :mode table :booktabs
#+LATEX_HEADER: \usepackage{esdiff}
#+LATEX_HEADER: \usepackage[version=4]{mhchem}
#+LATEX_HEADER: \usepackage{amssymb}
#+LATEX_HEADER: \usepackage{siunitx}
#+LATEX_HEADER: \usepackage{booktabs}
#+LATEX_HEADER: \setcounter{secnumdepth}{0}
#+LATEX_HEADER: \usepackage[margin=1in]{geometry}
#+LATEX_HEADER: \frenchspacing \allowdisplaybreaks
#+LATEX_HEADER: \usepackage{fancyhdr}
#+LATEX_HEADER: \pagestyle{fancy} % choose page-style
#+LATEX_HEADER: \fancyhf{}  % erase and clean up
#+LATEX_HEADER: \fancyhf[HLE,HRO]{\thepage} % H or F=Header or Footer, LCR=Left, Centre, Right
#+LATEX_HEADER: \fancyhf[HC]{My minted experiment}

* SECTION
#+BEGIN_SRC python
 print "there's some code here";
 a= True;
#+END_SRC
---------------------------------------------------------------


Here's the TeX file generated with the Export command (C-c C-e l o)
---------------------------------------------------------------
% Created 2017-04-23 Sun 13:23
\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{rotating}
\usepackage[normalem]{ulem}
\usepackage{amsmath}
\usepackage{textcomp}
\usepackage{marvosym}
\usepackage{wasysym}
\usepackage{amssymb}
\usepackage{hyperref}
\tolerance=1000
\usepackage{minted}
\usepackage{esdiff}
\usepackage[version=4]{mhchem}
\usepackage{amssymb}
\usepackage{siunitx}
\usepackage{booktabs}
\setcounter{secnumdepth}{0}
\usepackage[margin=1in]{geometry}
\frenchspacing \allowdisplaybreaks
\usepackage{fancyhdr}
\pagestyle{fancy} % choose page-style
\fancyhf{}  % erase and clean up
\fancyhf[HLE,HRO]{\thepage} % H or F=Header or Footer, LCR=Left, Centre, Right
\fancyhf[HC]{My minted experiment}
\author{me}
\date{}
\title{My Minted Experiment}
\hypersetup{
  pdfkeywords={},
  pdfsubject={},
  pdfcreator={Emacs 24.4.1 (Org mode 8.2.10)}}
\begin{document}

\maketitle

\section{SECTION}
\label{sec-1}
\begin{minted}[fontsize=\footnotesize,bgcolor=black,obeytabs=true]{python}
 print "there's some code here";
 a= True;
\end{minted}
% Emacs 24.4.1 (Org mode 8.2.10)
\end{document}
---------------------------------------------------------------

This is how the .emacs file looks now: 
-------------------------------------------------
 (server-start)
; (add-hook 'LaTeX-mode-hook 'turn-on-reftex)
 (setq reftex-plug-into-AUCTeX t)

;;; a key for tilde symbol
(define-key key-translation-map (kbd "M-2") (kbd "~"))
;;; a key for backquote symbol
(define-key key-translation-map (kbd "M-6") "")
(define-key key-translation-map (kbd "M-9") (kbd "`"))
;;this one's only for CDLaTeX math insertion
(define-key key-translation-map (kbd "C-1") (kbd "`"))

;; visual line word wrapping
(global-visual-line-mode t)

;;automatically recognize org files
(add-to-list 'auto-mode-alist '("\\.org\\'" . org-mode))

;; MINIMAL init FILE. HERE'S WHERE NICK'S INIT FILE STARTS

(add-to-list 'load-path "~/src/emacs/org/org-mode/lisp")

(require 'org-loaddefs)
(require 'org)

(add-to-list 'auto-mode-alist '("\\.org\\'" . org-mode))

(global-set-key "\C-cl" 'org-store-link)
(global-set-key "\C-cc" 'org-capture)
(global-set-key "\C-ca" 'org-agenda)

;;; 

(setq org-latex-listings 'minted
  org-latex-packages-alist '(("" "minted"))
  org-latex-pdf-process
  '("pdflatex -shell-escape -interaction nonstopmode -output-directory %o %f"
    "pdflatex -shell-escape -interaction nonstopmode -output-directory %o %f"))
-------------------------------------------------