Get your valves adjusted to the LOOSE side of the spec ASAP, and (minor point) make sure whether you should get the ignition switch recall performed.
The 'stalling while warming up' is one of the best clues that your valves are WAY tight. Your dealer is supposed to know this.
You need to document your 'adventures' with all these HONDA shops, and ask HONDA why the heck nobody told you that there's a BIG MISTAKE IN THE MANUAL, and you should have adjusted you valves a long time ago. Every 30,000 miles is the concensus around this forum.
Are they all CLUED OUT ? ? ? ? I hope your doctor is smarter than your HONDA dealer(s) . . . . You'd be dead by now.
Get your money back for all the NON-HELP YOUR DEALERS GAVE YOU. This might still end up costing about $1,000 to fix, if it's too late.