Many Aspies tend to like being the first and/or the last at something. For example, I'm significantly more likely to comment on a blog post or Like something on Facebook if I'm the first to do so. And I like to be among the first at an event so i have time to relax and collect my thoughts before most people arrive.
Conversely, if there are, say, five boxes of something on the shelf, even if I was going to get four under those circumstances I would probably buy all five this time.
To be sure, if there weren't close substitutes nearby, I'd make sure to leave some for others. And if it were a cafeteria or similar setting where if I took them all it would mean someone else goes hungry, I would make sure to only take one.
But if other people aren't being harmed, I enjoy being on first - or last - whenever possible.