Count me in as another guy who is very turned on by older men. While it can be quite a turn-on to think of a "daddy" or "daddy bear", I wouldn't say I necessarily have "daddy issues" because that doesn't have to be a part of the play/scene with me; it's just a possible hot role-play aspect with an older man (and an older man easily gives off the possible presumption of natural authority and arousing thoughts of bosses, policemen, firemen, foremen, and the like).
I'm definitely not into skinny/smooth young guys. Give me a big ol' bald, big-bellied hairy bear of a man over a skinny young smooth twink any day.
This has probably been said and repeated here many times (forgive me I haven't read all 9 pages of this thread), but why I find older men so attractive is that many older or "mature" men are comfortable with themselves and where they are in life; they know what they like, and what they want, and have a clear focus on what interests them. They can be more laid-back. They have wisdom and experience and can enjoy sharing that with a younger guy, or "guiding" him, some in a more dominant way, some in a beautiful loving, nurturing way.
I also love how men's bodies change as they age. Oftentimes guys have gained a little more weight, "put on a few pounds" (or many) as is natural, so it's not hard to find barrel chests or big ol' beer guts and bulging bellies among more mature men. And many men go bald on top but start growing more hair all over their bodies, even sprouting all over their shoulders and their back---most of whom sure never ask for it. But all these things turn me on.
And older men often have a very good "comfortable-with-themselves" sense of humor about their "flaws"; if a man can laugh at himself over gaining a "fat belly" or going bald, or sprouting shoulder and back hair, or having big feet, or smelly feet after a long day, that self-deprecating, "I give up, might as well laugh with nature" humorous acceptance turns me on even more. That is a definite plus unique about the male personality, particularly in older guys.
You guys 40 and up rock on!