Feedback?

TLDR; Looking for feedback on some of my games. Willing to review games (I'm decent at theory even if my mechanics aren't great) in exchange. If any players who are significantly lower rank than me (like mid or low bronze) don't feel comfortable critiquing my games, but want me to look over theirs and give them feedback, feel free to throw a link on here and I'll look over it.

So I'm mid silver, and looking to improve my play. I'm gonna throw way more games on here than I think anyone would ever look at, but if you want to look at one or two and review part of it and throw me some ideas, that'd be awesome. Feel free to look at just one part even (IE how to improve the early game in the first 10 minutes, or just watching team fights mid game and telling me how to do better.) Like I said, I'll happily review games for anyone who does this for me if you want a second set of eyes to look at how you might be making more of an impact in your games.

http://na.op.gg/match/observer/id=1842817632 Annie support. I think I did decent in this game, but don't play support a ton and wasn't used to annie's new auto range. Are there ways I should be harassing better in lane? What should I improve in terms of warding and item builds? Did I team fight right, or should I be doing it different? Should I roam more? Those are the spots I think I should be improving, answers to one or all are appreciated.

http://na.op.gg/match/observer/id=1842824657 Heimer vs Gnar top. Pretty sure my lane was the only one that lost. I tried to dive early being greedy at level six and didn't have the mana to do a full rotation, plus Gnar reacted right and went toward lane away from his tower instead of trying to retreat. I was too aggro and died to a lane gank when I came back to lane (w/ no ult), and had a half second lag that stopped me from stunning under tower, but I think I should have tried to stun sooner in order to live. Also over stayed mid on a rotation getting greedy for tower. What else should I be doing better?

http://na.op.gg/match/observer/id=1842662028 Heimer vs Ahri mid. My team struggled, and I threw away an early lead trying to steal blue and not just backing off when zac didn't join me (the greed is real). How should I have played to impact the game more and help out my team? What else am I doing wrong besides the throw away of my lead?

http://na.op.gg/match/observer/id=1840602814 Heimer vs Rumble top. Over stayed top not respecting the TP and had poor map awareness to boot, getting killed by a brand roam and throwing away my early lead again. Played on tilt after bc I was frustrated w/ myself. How do I improve my impact on team? Again, they struggled a bit, and I should have done more to turn it around w/ the lead I had, instead of throwing the lead away.

http://na.op.gg/match/observer/id=1840580429d Heimer vs Talon mid. Graves carried this game pretty hard, and I feel like my kill participation was pretty low. Should I have been rotating different, or was the CS worth how I rotated?

http://na.op.gg/match/observer/id=1839247097 Heimer vs Xerath mid. Holy shit my kill participation was bad. Pretty sure I would have lost if team didn't do well. Where should I be rotating better?

http://na.op.gg/match/observer/id=1842609281 Heimer vs Cass mid. Not sure I could have done better on this one, but after posting links to so many bad Heimer games I wanted to post one I was proud of :P

Huge thanks to anyone who takes the time to look at any of these, and like I said, post a link to op.gg recording or something, and I'll be glad to look over your game and give feed back if you want. Hopefully it might even be useful and I'll see something that you might not have noticed (second set of eyes and all).