Yes me to. I often feel detached from the "real world" as well as my own body which in the past has led me to question (my) reality. Id say with me its often a feeling like I exist (and live) in my own head and the rest of me is just a vessel. This vessel does have the capability to feel like a comfy pair of shoes yet at other times its what I imagine Roger Moore must have felt like during his later, girdle wearing Bond years.
I find myself retreating into my own head (more so when Im feeling low I think). This sort of zoning happens frequently. My other half will often ask "where were you" when I've snapped out of what must look like I was either daydreaming or deep in thought. Neither of which is exactly right.
I do go through stages of what is probably hopelessness when I question the point and purpose of everything around me including myself. The famous, I think therefore I am quote doesnt cut it for me. In my opinion, I think therefore I am becomes irrelevant when noone hears your thoughts. In other words, If I think therefore I am (but dont do) what separates me from "non-intelligent" life, and by implication therefore, what's my purpose / point of being here (pause for breath) if im just going through the motions of "normal life" without doing precisely what I want to do when I want to do it at all times. There is another quote from somewhere along the lines of "if by a man's works we shall know him" (though I think I got this from Blackadder so it may not be 100% reliable) which is true when what others perceive of you (or at least what you appear to do/be) is whats important in the developed society - and the only lasting legacy (ignoring offspring in that).
I personally don't feel driven to
show that I can achieve something to people that don't matter, yet on some level I know I need their approval / acceptance (a conflict I know) to remind me that Im alive. My problem is that I question too many things too much to the point that efforts to do most things seem futile in some bigger picture (im not talking religion either btw). I think this sort of attitude is probably what prevents me maintaning a relative happiness though and why I feel like someone is playing yo yo with my mood on a daily basis.
With that in mind, If id written this tomorrow it may have been a more cheery response