I started with one Gen 2 then Gen 3 Glocks, which were a decent guns, had some problems but nothing that couldn't be solved, then moved into Gen 4's, I purchased 2 when they first came out, a big mistake ejection issues that Glock said was ammo related or shooter issues, it wasn't, one had a accuracy issue Then went to Gen5, finish issues, better triggers but couldn't handle the finish issue.
My Shadow Systems MR920/CR920 have never had a issue but have only put about 350 rounds through each them, with out a issue, one still needs more rounds to get the trigger worked out a little but all is good.
I've owned many, many HK's P7, USP, P30, P2000 and now some striker VP9's. Really like HK, very high quality and never had any problems, HK's I'd take to war any time. My FN's follow closely to HK super quality.
The guns that I like for quality, customization and I own the most of are Sigs, the P226 I've owned for decades with some rifles and the P320/P365's these are Modular guns and Modular guns are the future in guns.
Cz P10c/s are hands down the Best Buy in the business and their quality isn't duplicated by anyone for the price and their 75 series all the way through their competition guns are the highest quality.
I jumped into 80% about 4/5 years ago and built a couple out of Glock Gen 3s then I decided I didn't want guns without serial numbers so I took them apart and put all the parts back in my Gen 3s and that was it for 80%. Of coarse now they have serialized guns so maybe I'll try again. I do have Daggers that I enjoy making plus they're cheap to customize plus good guns.
Of coarse this is all IMHO and many decades of having guns as a hobby, or maybe it's a addiction :>)