Oh my, watching back replays is embarrassing sometimes, I can't even imagine what the ones I lost look like.
After about 400 games I've just started working on perfecting early game last-hitting as I generally play a lot characters that require levels more than farm, i.e. playing self-sufficient supports or offlaners (farm never hurts obviously). In my last couple of games it looks like I have around 50 cs at the 10 minute mark in the safe-lane or mid-lane.
I also thought my mechanical skills were a lot better than they were, using items and timing abilities correctly, but it seems I've actually been getting by mostly on map/situational awareness.