My go-to drill for most projects is a Bosch 36v LiIon I've had for several years. It's been beat to ****. I've done everything with it from lag bolts to drilling 2" holes all the time and it asks for more. The trigger got a little funny for a while but now it's back to normal. It's been dropped, painted on by people who "borrowed" it (I keep my tools looking nice, this looks like **** now!) I plan on buying a new 36v set when I can afford it, I LOVE this drill and it can do more than you'd ever expect from a cordless other than the 28v Milwaukee perhaps.
Then, I have 3 Bosch 18v's, all bought on various sales with free batteries. Hammer drill from a Menards sale, the regular new-model drill and impact driver from the Amazon mis-price, and the old-style 1/2" clutch 18v which has the metal clutch. I use this for basic drilling/etc., but I prefer the power of my 36v.
Then, various Bosch 12v's fill in for all the common tasks - putting furniture together, electrical work, small screws, etc. Love these as well, lots of power and very compact.
Newest in use toy (I've had it for a while but never used it) is the Dewalt DWD460 11-amp stud drill. This thing is a BEAST. I bought it because it was clearanced 60% off from Lowes and just started using it months after I bought it. It'll drive a 2 9/16" Irwin self feeder through 12" thick oak and elm beams without issue.
IMO, I love standardizing on batteries and have always had terrific luck with Bosch, plus I love Bosch as a brand overall. But I think any of the mainstream drills offer relatively similar performance, construction and longevity... Dewalt, Milwaukee, Makita, etc.