Interesting thread screen. I like what you put on on most threads, even if you come over a bit rude some times. you seem honest and on a hunt for knowledge.

You ask if anyone has had a proper conversation with their subconscious. I have heard this from a million people on here:
I want to LD so that I can talk to my subconscious.
I don't quite understand what they want. I am guessing a DC that has a name tag that says "hello my name is your subconscious" and they will tell them about all the things that they ever need to know. Lol. This seems ridiculous to me. How would me or a part of me know something that I dont?I am the active player in my game of life. I know more than my subconscious. People want this mystical thing inside themselves to let them know "who they are". I know who I am, and it didn't take years of meditating or lucid dreaming to find it out. Everyone has "voices" in their head always hinting at where they should go and things that they should do. Listening to this, I realized that it is just things that I already know being pulled up., and I have it in me to be the next Ghandi or the next Dahmer, depending on what I choose. So it isn't some crazy philosophical answer, but it is the truth. Yes, things like circumstances or hormonal imbalances may lean you one way or the other, but in the end, you are who you choose to be.

What talking to your subconscious is really like:
Every dream character, every dream scene, every universe you are put in is your subconscious talking to you. This may contradict what I said last, lol, but I believe that dreams are a product of our thoughts mixed with our state of mind. So if you want a quick look at your state of mind, check out your non lucids.
Every dream character.
Technically, every dream character is your subconscious, but if you think of it that way 99% of the time, especially in lucids, you will think that your subconscious is mentally challenged. It seems like their are 3 types of dream characters, when lucid you can change things with dream control, but if you are just letting it run or not exercizing power, you will run into.
1) object DCs.
These are no more than parts of the background, but since you became lucid, you wanted to talk to them. They will stare at you. They aren't really meant to be in the foreground. If you look at them a little too much, you might notice a lack of detail. You would get more of an answer from the couch. Note object. Haha.

2) purpose DCs.
This DC was originally in the dream for a purpose. He was planning on saying "Marco!" And that was it. You walk up to him and think I will have a conversation with a DC! you put out your hand for him to shake it and have a conversation.
Me: what do you represent in the dream?
Him: Marco!
maybe he didn't hear you. Or that is his name
Me: Marco, what do you represent?
"Marco": Marco!
His eyes are wide and he is looking at you strange.
"Marco": Marco!
You leave.

After they do their purpose, they may leave or repeat. They may say more or less than this and are actually very similar to object DCs in the first place. Or if you exercise dream control, you might be able to change them into:

3) character dream characters.
You know these. They are just like people. Most of the time they are douches though. They can steal lucidity, stab you in the back or just convince you of something stupid. These are the ones that people call dream guides if they find one that wants to help. They seem to have a full blown personality with a personality of their own.

My phone rings, and I try to answer it, I had been lucid for about 20 minutes already.
Receptionist: those don't work down here.
I try to slide to answer the phone anyways. It is my mother.
Receptionist: look, it is morning already anyways.
I look from the moon base and see the sun rising on the horizon
Receptionist: you should wake up now.
Me: ok
I concentrate on both sets of eyes and open my real ones.

I am now awake in my bed. The clock reads 3 AM... That B.

Now... About them telling you how to LD better.
I would post links, but I am sure that you have seen them everywhere. Lots and lots of people including me have a DC that acts as a guide to the dream world. I wouldn't be able to do much dream control if I hadn't been taught the "walk method" by the old man. This can go as "my subconscious knowing me more than i know myself", expectation, or schema dream control.

So I think that everyone "talks to their subconscious" they just dont realize that it isn't a sentient being. If it is, it gets its "sentience" from you, so it doesn't has all that much to say.

edit: oh crap! I wrote more than the OP
Oh! I am putting up a thread about dream contents tomorrow. Be sure to check it out.