I use a Shark Evoline Series 2 for cold weather riding. It's an incredibly versatile helmet, though it's a little boomy. In hot weather, even in the rain, I'd rather have a half helmet.

 

Nolan Trilogy Outlaw. Like to have the option of going FF or open with or without chin guard. Great in the torrential rain, no leaks and stays clear. Drop down sun screen is a benefit, but it could do with being a bit lower. Comfortable. Just added iMC intercom for my music......oh and the Wife.... She likes her Nolan too.

 

I got used to wearing a HJC cl33 all the time. It's comfortable enough and I have probably a couple hundred thousand miles wearing one...just gets heavy at the end of a long day of riding. I have a half-shell at home that I use for around town...but end up using the CL33 most of the time.
But..it wore out (got too loose) so I went to buy another one. The guy talked me into a IS33. So, I bought it, installed the speakers and left for a 3 week trip through western states. After 3 days it was hurting me' poor old head pretty badly so started trying to adjust it to fit me better. FInally, after 8 days, I stopped and bought a hybrid half-helmet at a Harley shop. Half the weight but no shield to pop down in the rain. Oh well. Zip on collar though and better visibility. And most important...way more comfortable. 3 days with it so far on this trip and it is very comfortable.
My advice...try them all on and go with the most comfortable first, then features. The flip down shield will be missed but unless I can find another CL33..I won't bother with them. Just my personal experience...