A possible romance option in Mass Effect 3 is Miranda, the (Ex-)Cerberus Agent. Halfway through the game she makes an appearance where you can select if you still have interest in her (provided you did in ME2) and later on she meets you in the presidential commons for this Scene.
Haven’t even started to play properly but ended up more interested tweaking Mass Effect 3 more than actually playing it. As usually I started using Cheat Engine to tweak Credits and Power Points, but that ended up being somewhat unreliable, a few issues came up. Mass Effect 3 brings a more convenient way to tweak stuff, the Coalesced.bin, formerly known as Coalescd.ini in Mass Effect 2.
If you recall Cynthia in Act 2, you will surely remember the love scene with Philippa Eilhart. Since a nude model exists, it can be extracted the usual way and by swapping out the models will make her appear undressed at every scene ingame.
Out of curiosity I was looking at the xml-files in the Witcher 2 folder and noticed that there were some skin definitions. It was rather easy to make Triss Merigold appear nude everywhere. Sure it may be childish, on the other hand it doesn’t hurt anyone to give thes dark times a pleasant, bright contrast.
I got asked to make all items available, so I put up a super vendor in Act 1. The Merchant Fioravanti is right in Flotsam at the Marketplace and will have all Armor, Weapons, Trophies, Mutagens and Armor Reinforcements for sale!
In case you find Witcher 2 too difficult, or are more interested in the story than the game I have modified Heart of Melitele in the def_item_misc.xml to make you very powerful. When you meet „Newboy“ at the very start of Witcher 2, you agree to have a look at his talisman and then persuade him that it might be cursed he will give it to you.