I've found a few interesting things about time travel recently, revelations really. First and the most important of which is that the current present you inhabit is a collective of the current past, bubbles aside. That is to say rather than only inhabiting the time as defined by overlapping bubble time events discussed in a previous post, you instead are inhabiting the time line itself as it would exist based on all past events. So while an event might only effect a given region if it becomes a historical fact such as newspaper for example then any point in time beyond that it becomes a part of the timeline. So when you make a change in the past however big or small it does become a part of the line itself and going into the future perhaps at a different location you'll be able to observe yourself and your changes provided you can access that information out of that region. This was interesting to me in that prior my thought of it was that a change only happened in the timeline of that region and didn't spread beyond the bubble, rather now it seems all bubbles are interconnected regardless of overlap. This could have more serious consequences than I'd originally conceived.
So to clarify on the current past I'll use a couple classic examples. In the grandfather paradox you may not actually exist, which interestingly enough doesn't seem to matter. While you may have created and destroyed timelines your energy has been transferred all the same and you could even go so far as to kill yourself before traveling and still continue to exist. Apparently the continuum is more flexible than I'd originally thought as well. If for another example you were to take an item from the past with you into the future, the present you occupy in that future would behave as though that item had not been there the entire time. If I took an item from a museum into the future the past of that future which determines the present would show that the item had been missing all that time. Strangely if you take that item in the past the two can be put next to each other up until the point in which it was taken unless something is done to stop it from being taken in which both items would continue to exist. It's very strange like that. Your memory doesn't seem to get altered because you're the traveler but the memories of anyone else not having traveled will behave as the collective past similar to the timeline itself because that is all they had experiences. A few individuals may have additional memories or feel something off but that is rare.
Next and more of a factoid than anything serious is that it's easier to move into the future than the past. Referring of course to the past prior to your present of origin. Returning to your origin from the future is the easiest time travel of all provided you're not in a different time for too long otherwise things can get a little jittery and when dealing with time jittery is a VERY SERIOUS problem. You risk becoming unstuck with no anchor to a given time you simply float through all of them randomly and constantly making a life or the remainder of whatever life you have very difficult. The exact nature of getting into a jittery type state is simply when your connection to the time you're in becomes equal or stronger than the connection to your origin while you're trying to move through a timeline. Though this problem to my knowledge does not present itself when jumping entire timelines all together. Though to correct myself it's more about the connection you're making with your destination and not with your actual origin. Though it would seem most transitions occur by passing through your origin at some point or another. As to the specific reason why it's easier to move forward than backward still eludes me, perhaps it's not universal simply a bias on my part, it's still something worth looking into either way.