[Quiteria]

I usually interpret the ... by personality.

For straight-forward thinkers who tend to trail off while legitimately pondering something, or who ramble on tangents a lot like I do, it's no more than a comfortable pause while thinking or transition between trains of thought. If it's someone nice saying "how neat..." or "don't make an extra stop...", I assume they mean that it's neater than they can find the words to elaborate right now, or they don't want to inconvenience me to make and extra stop but are leaving it up to me to make the final call (or they're doing the obligatory protest thing where they will appreciate it if we go to the trouble of stopping but don't quite want to be responsible for making us do so).

For people who are known to speak passive-aggressively, then it might imply that someone wants you to complete the sentence yourself with whatever rude thought or obvious caution or so forth.

I really, really hate trying to read between the lines, so I try to assign positive intent. I use enough ellipses myself that I usually don't hear them aggressively...but then again, mine tend to be mid-sentence transitions instead of endings. (I'm not sure that example is quite natural, but it would be a case where I was pausing to ponder the accuracy of "usually don't hear them that way" and then continuing when I came up with an exception.)