I owned multiple HTC devices, on multiple carriers, and found myself consistently frustrated by the devices' inability to meet my needs and desires. While sturdily built, and pretty to look at, they all consistently fell short of my expectations. I switched to Samsung with the S2, owning that, the S3, and the S4 before moving to my favourite phone ever, my Note 4. Samsung isn't perfect either, and until I got to my Note 4 I consistently was looking forward to the next software update or model release. The Note 4 seems to have culminated my experience beautifully, as it is the first time ever that I am not worried about the next software update or model in the line. I will happily use this device until my upgrade in two years, and that's the first time I've said thay about any smart device, all the way back to my Palm Pilot. I've converted my whole family, as well as a number of my friends and colleagues, to Samsung phones and tablets, and all of them report the same preference for the Samsung devices over their old devices.
In the end, like such else in life, these things come very much to personal preference. There's no way to know which one YOU will like best until you have them as your daily driver for a while. Either do the trial period offered by the cell company with an HTC or Samsung of your choosing (strongly recommend the Note 4; the SPen simply cannot be outclassed), and see how it works for you. We pay out too much on these contracts, and our phones are too integrated into our lives not to be running a phone you enjoy using as your daily driver.
Best wishes, and let us know how you fare!
Kelly
Samsung Galaxy Note 4 (Verizon)
Samsung Galaxy Note Pro 12.2