Ehhh... Name tags.
I have used them before in situations of RP, where rankings/packs/etc were needed, like in my old wolf RP, which consisted of two different packs in the same group. Tags were helpful then, but it showed -only- the rankings and pack affiliation.
However, in general, random RP? I only really see the need for them if you are a species that is uncommon. A dragon, perhaps, though I could see that one getting away with being an easy guess. And if you're a bear, or a fish, or a lizard, I could see a species tag being understandable.
However, I've never truly saw the real need for a gender tag, since the pronouns you'd use while roleplaying could very easily show your character's gender, even if their looks/name don't already give that away.
But in general, I don't use tags, and I prefer to just have the name, and let your character bio and RP posts tell the rest.