The gargoyle take on cock size:
I consider myself a "versatile top". To me, that means I prefer to top, but I don't mind bottoming if I'm in the mood and the guy really wants to. So, in general, I'm not bottoming, and so cock size in regards to that really doesn't come into play.
Since assuming I won't be bottoming, a cock is just something for me to play with - something to hold, stroke, lick, suck, whatever. And all things being equal, the bigger the better. Just because it gives me more to grab, hold, stroke, etc.
But the key part there is "all things being equal". That's not just a tossed-off phrase - it's the key part. It puts cock size on the same level as, say, the color of your car (if you even have one). I kinda like green cars, so all things being equal, yeah, it'd be nice if you had a green car. If you don't, it doesn't change anything. I won't kick you out of my room for having a blue car, or a motorcycle, or a bus pass. It's a very mild basic preference - no more, no less.
The biggest guy I've ever had sex with was at least eight inches, and probably close to nine. The two smallest were under five. And the largest guy was easily the worst lover I've had, and the two smallest guys were the easily the best.
Mind you, I don't think there's an inverse correlation here. I don't think bigger dick = worse lover. There are reasons for that. The big guy was a virgin (as was I, at the time) and we just had no idea what we were doing. Yeah, it was fun getting to play with a cock that large. But that fun didn't make up for the fact that he didn't have any idea what to do with it. It sort of ended up being like...I dunno, having lackluster sex in a really nice hotel room. Yeah, it'd be nice to be in the hotel room, but the sex was still "enh".
The two under-five-inch guys? They were fantastic lovers. They threw themselves into the act. The sex was amazingly hot. I wasn't disappointed at all when I took their underwear off and saw their cocks. Because by that point, I knew the sex was going to be great. Would it have been better had they been larger? Perhaps - again, it would've been better in a really nice hotel room, too, but I wasn't thinking about that during the act. I was too busy losing myself in some amazing sex.
Back to you. If all you want is a guy to "suck your small cock", I'd say what you're doing is fine. But why highlight your possibly negative features? If I were going to post an online ad, I wouldn't say "Who wants to go to bed with an overweight guy?" or "Who wants to bottom for a balding guy?" I don't lie about being bald or overweight or any other negative I might have, but I wouldn't highlight it, either. Feel free to list how hung you are in the ad, if you feel it's important, but the main idea should be that you're gay and you're interested in having sex with another gay guy.
Lex