I am a computer engineer, trying to track and edit few computer and/or technology related pages and add or edit them, tried to add to a page once (a page on round-off error), but the addition was reversed due to complaint that the additions were copyright material, well, deleting it doesn't solve it, in my opinion deleting is not a solution, the solution is revise it to go around the copyright issue. Other interest of mine is to revise pages after sabotage, or comment on info or style that I don't agree on, I did few of these, trying to be active on the wikipedia community, but I guess it is competitive, and many people do complain about the difficulties of maintaining their edits, it seems Wikipedia have managed to get itself into a bureaucratic system (don't get me wrong, I still respect it).
More to come, hopefully soon.