Your experiment isn't nothing new. Let me explain: This is the way this site is suposed to work. You give me some feedback on my tracks, and I give you some in yours... I usually try the tracks from people who awarded me or comment on my tracks, and try to give them some feedback or awards (If their track IMO deserves it).
I tryied two of your tracks (I will try the rest when having free time):
Easy Rider: Nothing special. It has no mistakes, but I can't find nothing fresh on it. IMO only thing to mention is the inside cam on TM. I liked. But I don't give much credit on TM, I use to focus just in track when comenting, not pay much atention on "ornaments"...
Of course, it will work nice as a track when playing with nice people... But you can say this about almost tracks.
Twidles: You got my award (fully deserved): This track has a nice and fresh start. It's a bit difficult at firsts runs, but you can see new (and working soft) ideas on it. Nice scenery and flow. Challenguin (at least for me) and rewarding when you do a nice lap.
Second part (when entering the tarmac) is like another diferent track: It has a diferent atmosphere. Nice flow, and nice lines.
I think entire track would be better if you delete the second part, and continue building from there with the same style in the first part, but this is just a personal taste... I know lot of people likes variety on a track.
After this track, I will play the rest of your tracks for sure... It denotes athor knows what is doing
Feel free to coment all you want if you try my maps. I play TM since don't remember when XD But until now, didn't waste much time on building. I'm just a learner on building maps: I know my tracks maybe don't deserve thousand of awards, but i think they aren't craps. I will apreciate any kind of feedback.