When I started off on Flickr I used to take terrible shots (and I had been shooting for 17 years). You can see for yourself http://www.flickr.com/photos/pvs2007/ if you go to the last few pages and in those days you never got 100 comments and 200 faves. There were a couple of people who might still like your photo but the key was to look for "good" photographers and "virtual groups" where you could see some classy shots and invite criticism so that you can change your perspective to take better shots. One such group is "Make it a Mega Shot" which is run by Cyrus Khamak and a few Flickr contacts. My photography improved leaps and bounds in a matter of a few months and so has the clicking ability of a lot of people I know. The reason was simple, we were not in a race to garner "nice" comments
About comments and criticism: Yes, everyone likes a "nice" comment, including me and I would be lying if I said I don't look at that column everyday against a photo I uploaded BUT that is not the be all and end all (if you consider yourself in the 10% or less, of course).
If you ask for criticism on Flickr you do get it and get it real bad. That's because you are BAD, accept it and life will be much better. There will be photos you think are amazing and will be the flavor of the day on Flickr and suddenly one guy will come and tear it apart, it has happened and rather than having a sullen face just get on with the next shot.
NEVER BE DEFENSIVE else people will stop critiquing your photos, unless that's what you want. There is nothing called "constructive criticism, mild criticism etc etc". Criticism is criticism, period. You have the heart to take it then you might improve, else languish in your current state forever
The "Explore" rush: Yes, getting your photo on to explore is a definite thrill. Flickr says it is among 500 photos of a particular day and it is also ranked and the top few photos appear on the 1st page for a few minutes. Great, but what does it mean to you? You do surely get more people to see your photo, which is awesome BUT it surely does not necessarily mean that your photo is classy. A lot of crappy photos get into Explore too. An algorithm decides which photo goes into Explore and it heavily depends on the number of comments, faves, views you get within a short time from the time of posting the picture. A lot of "I scratch your back and you scratch mine" goes on in this race. People leave "nice comments" on any and every photo just so that those guys do the same on theirs and suddenly you have an "Explore" photo. But one simple question at the end: what has this done to improving the way you click???
I am not against getting photos on Explore or enjoying the time it gets there but again apart from giving you that viewership it really does not add any value to your photo taking abilities in anyway. And it is not a tale of sour grapes, I have had 67 of my photos on Explore at some point, even now I think 3 are there
The worst thing to do: Do NOT ask for critiques if you don't have the appetite for them. If you want "nice" comments from people who do not understand photography go ahead and enjoy but don't do it under the garb on someone who is out there to become a "serious" photographer and "learn" from fellow Flickrites, you will be disrobed very soon as it will be come apparent over a period of time that you don't like people not liking your photo and the fact will be visible to everyone that you aren't improving either!
I know this sounds like a very negative post but I had to write for the 10% or less, as I mentioned earlier-they probably will realize the value of this