I have never traded a game on Steam before.
Reading up on it I found you can only trade gifted games. I haven't literally received any games as a gift, but I have a crapload of Steam keys (from bundle purchases) that could be added to gift inventory. Mostly indie titles but also some AAA games I've no interest in.
There's a short-list of titles I'm seeking, which I could put here, but not sure if that's within proper decorum..?