Your penis is okay. It looks to be in the long and skinny subset of the Average category. The guys who liked it told you so, and if you were standing naked in the room with them, those who said they would suck it probably would. It doesn't mean you're the king of penis. It means you showed it to people who liked dicks and a lot of them appreciated it.
We come here because we like dicks. It feels good to show each other, compliment those that appeal to us, and be complimented by those who like ours. Look in the chatroom and in other people's albums, man. Pretty much everyone who puts himself out there by showing it to the group will be appreciated by someone or other, and in turn he's going to see something he appreciates, too. There's variety and it's reciprocal. For the most part it's pretty genuine. The only time the comments get negative is if the guy's attitude is a turn off. Then everyone gets irritated: those who otherwise would have complimented don't really want to anymore, and those who weren't that impressed come right out with it.
Keep perspective. We are here to appreciate each other's dicks. Just as it isn't the end of the world if a few people don't find yours to their liking, don't let it define your life because several people thought yours merited a kind word.
You don't have to convince us of whatever orientation you are or want to be. We don't really care if you like guys or not.
I kind of think you're not so sure your cock is that great and were looking for validation once you got a taste of the guys here appreciating it. We're not set up to give you validation much more meaningful than, "Hey, man, nice dick, you're hot" (and even then, that's not going to be the case for every single person here). That should (and will) come from someone who can mean more to you, and vice versa, than is true of a bunch of dudes you'll probably never meet who like to have a little guy time online after work.