My favourite translated VN is
Snow Sakura. It's hilarious, and I actually got a little attached to the characters.
However, my very favourite is
Fortune Arterial, which I read with the aid of translators. Just so you know, the original is a hundred times better than the anime, even if the anime is quite watchable. I literally fell in love with Erika. The second time in my life I got a crush on an imaginary character (if we exclude a dream I once had, lol). The skill of the writing shone through the horrible machine translations, and the mood was quite powerful.
Of course, if I were to judge based on the HCG's, I'd come up with completely different names and a lot more of them...