The voting power on EOS decay's over time. I believe it's 1%/week so you should reset your proxy choice every so often to maintain the integrity of your vote strength. There will be tools developed to auto vote soon enough but for now, it's going to have to do. Thank you very much for the compliment! It's a full time job being a watchdog but it's really rewarding for me because I know it's helping the health of our great eos network.