>>14Just the massive required headers (bandwidth), synchronous transmission (really? when everyone knows asynchronous is the way to go), few TCP unsafe protocols, and that most HTTP servers abuse it to gather unnecessary intel on their users. Fingerprint is the worse, it and was made the norm two decades ago. Honestly, I like NNTP and STOMP the best. PSYC being the best freeform contender. And IRC, is well IRC.
Notes:
http://www.w3.org/Protocols/HTTP/1.0/HTTPPerformance.htmlhttp://www.ics.uci.edu/~fielding/pubs/dissertation/web_arch_domain.htm