Many long rides. Many straight down the interstate with heated gear. Not alot of short trips, but a few. Voltmeter installed. What do you long timer, high milers use and recommend.
I still use the flooded battery that came in my KLR 18 months and 18,000 miles ago. I usually buy Yuasa batteries for bikes, but if this "EverStart" brand battery won't die, I won't replace it.
I add distilled water regularly. The large syringes from used for fiberglass/epoxy are great for getting water into motorcycle batteries.
The KLR charges at such high voltages that I wouldn't put an AGM in there. I have a Deka AGM battery on another bike that charges at a lower voltage. The manufacturer recommends that the "float" charge is always lower than the voltage that my KLR runs when on longer trips. After starting the bike and running around town, the voltage will stay lower as the battery charges, but it will eventually charge at over 14.5.
Battery electrolyte will "boil off" at 14V or above. (Actually the water breaks into hydrogen and oxygen by electrolysis, but saying it that way is pedantic.) A flooded battery at least allows me to let it boil off and replace the water.
Other battery types are less forgiving of high voltages. Gelled, AGM, Lithium (of various types) all need lower voltages. And I look constantly. Some new lithium batteries come with circuitry to prevent overcharge and I would seriously consider one for the KLR.
My house runs on lead-acid batteries charged by solar that I installed myself 12 years ago and a wind turbine that I built myself a couple of years ago, including winding the coils and carving the blades. I'm serious about batteries.