Those subtle connections are what you are comfortable with and can try to understand.  I would say it was spirit coming to bring comfort in your need.  BTW that makes you a psychic/medium after all.  

When you make an attunement with your own spirit guide YOU design your preferences.  I do not wish to see spirit up front in my face, so they come more subtly to me as well.  I know when they are there, but I don't have to 'see' them in all their gory details.

I also 'see' spirit with a description in my mind.  In that way, I am describing who is there without actually seeing them as a full body image.

ok, sometimes, especially when i'm on my laptop and it's quiet and i'm just reading, i do feel like something touching me sometimes. It's not really a touch, it's more like a feeling as if an insect is crawling on me. Sometimes i feel a really cold feeling on parts of my body (face one time), it feels as if a ice pack was placed on me but it wasn't as freezing.

Sometimes i think i'm imagining it, but i'm becoming more aware of it ever since i've been reading about mediumship, etc.

Are these the feelings people get when spirits are trying to make connection ?

Yes, that is how it comes.  We use all our senses.  And we must remember the skin is our largest organ - they can touch us anywhere and the nerve endings under our skin will react.

On my own, I haven't visually seen too much, although I wish I could.  Once, I was assisted by someone via a very intense neck and shoulder massage which , I guess (because I never saw him again to be able to ask about it) put me into a kind of trance, or hypnotized me.  I saw three figures in all. Of the first my memory is sketchiest- was a man in a white robe with a long white beard and hair.  I remember him speaking to me as though he knew me, but briefly and I don't recall what was said. The other two were people I knew separately who, sadly, each ended their own life.  I recall how they appeared to me quite well.  Best way to describe it is to imagine a colour photograph of a person made out of transparent coloured light- but not bright shining light, more of a soft glow.  I recall something disjointed about having to focus on their wholeness as well as their lips simultaneously to be able to 'hear' them speak to me.  

(It's beside the point of this post but, as a melancholy post script, I will add that one of them, Rebecca, kept saying to me, "don't waste your life, don't waste your life.")

Flow spirit flow.  Just be open to all sensations on your senses and the psychic awareness will open as well.