Hi CH, as you said you have already rejected 300 designs, and as you have mentioned the things you do not want, I would request you to tell us what you DO want if anything comes to mind, even a vague idea might be very useful. This would help us the designers a lot and I am sure you'll be rewarded with the best design this time around! Thanks.
CH should change the brief every 3 days so that all you contestants can work on the same logo forever and ever!! CH should also be really abstract and submit very poor design briefs so everyone is really unclear on what CH wants.