ME1- I killed of Kaidan, saved Wrex. Saved the Rachni queen. Killed the Council. Romanced no one in ME1 (it was Tali or no one for me!). Full Renegade, with the exception to my crew. I can't bring myself to be a jerk for no reason to my crew, but a lot of other Renegade options were very appealing to me.
ME2- Everyone survived, I killed the Collector base, maintained peace between Tali and Legion, destroyed the Heretic Geth, Tali wasn't exiled, the Genophage data was kept, I agreed to be a Spectre again. Romanced Tali. Full renegade the same way I did it in ME1, with the exception to the characters I liked and my crew.
ME3- Cured Genophage, saved Geth (both the Geth and Quarians lived), saved Rachni Queen. Romanced Tali. I was half renegade and half paragon, and had every option available to me the entire game when there was a choice, so I basically just did what I wanted. I chose to synthesize, had a 99% readiness rating and about 5500 military strength at the end. What. The. Fuck. Was that ending? I'm pretty sure any fan of the series could write a fucking better ending.