I suppose we all have some degree of inborn preferences that influence our choice of a mate. They often say that straight men tend to subconsciously marry their mothers, so do gay men date and marry their fathers?
The problem I see with declaring a type is that you tend to get locked into it. Narrow your choices too much and you'll have trouble thinking outside that box, and begin to have difficulty finding a man who's also got the one thing he must always have without exception: an interest and love in YOU.
And I see this happen again and again, and was a topic my partner & I discussed just yesterday, talking about a friend. This guy's on yet another new BF, who's the clone of all his predecessors. And we wondered why he keeps picking this same physical type, and why he doesn't expand his range so he'll have a better chance of meeting men who won't disappoint him.
Now I do have my preferences, but more in a negative approach, the things I don't want in a man, like laziness, deceitfulness and unfaithfulness. But no real must-haves, except that he truly like ME. That alone naturally narrows the field rather drastically for me, but offsetting that is the fact that I'll take them in all shapes, sizes & colors.
And while I don't think in terms of my type, I must confess I sometimes use it as an excuse. When a guy starts coming on to me too strongly, and I'm not interested, I'll tell him he's a real nice guy, but just not my type. Fortunately most gay men understand this reason, and it lets them down a little easier, rather than saying "I just don't like YOU." So I guess type has at least one good purpose.