This definitely reflects my personal preferences as the art is lovely.
I actually prefer Titus (bishounen) instead of Lambert (mustache, big eyebrows) when considering them as dateable characters. Although I admit that Titus does give the impression of being a bit too plain (or rather not unique enough) where even just changing his hairstyle could go a long way (I like his face profile a lot).
I won't be opposed to a "rough guy" design either. Referring to the example in context of a dateable character, then I would have liked the eyes to be more... striking/piercing, but the impression otherwise is good.