Well done, riding almost 40 years...
I am leaning on 60, and just bought my first full face, an R-1100...  You use the vents, I run with sunglasses and shield up except in the rain...  You will get used to it.  If anything, now it gives me a snug home feeling, snug fit against my jaw, and becomes one with my head.  
Mine is black, here in summer in Australia gets over 100 degrees, and not a drama.  If anything, you gain a little flexibility as the only action is to "Head Check" you gain that look over your shoulder extension and it seems to improve your stretch.  It is the only F/F that fit so well.  You did the smart thing there, not an extreme, a very good move.  Congratulations...
From the Pros stand, Shoei is near or at Number One in the world... I am going to look at the new HD F/F that is talked about in the F/F topic, for better Blue Tooth and communications if it is set up for it for my new CVO 11.5 BIG BLUE coming in July to Oz..  But you have done a very good thing there.  
If you break a leg, there is always a Trike. 
Breaking your head, ends joy on a bike...