I have loads of Eneloops and some Eneloops Pros (Actually LADDA, which are Eneloop Pros via Ikea).
Don't do much alkaline anymore because ecology and they often leak chemicals, which is a bitch and can ruin your equipment.
The extra voltage of alkalines doesn't matter to me so I use rechargeables if they work and they usually do. I always have a supply of well charged rechargeables.
My niece's husband just gifted me Kickstarter Ligony battery system, Li-ions that are 1.5v, AA and AAA and charger. Probably crap batteries, but at least initially they presumably have 3600 and 1300+ mah capacities. Those ratings are probably inflated by ~30%.
The best batteries I have are Lithium, not rechargeable. Like 1.70v, AA and AAA. They have monster long shelf lives, high capacity. My Yolink fridge wifi temp/humidity monitors love them, especially the one in freezer.