I've only owned Samsung Galaxy series smartphones. Prior to those it was the junk like the Razor ...hahahaha ...remember those and how cool we thought we were...
Anyways, I've always liked android vs. iPhone because you can customize to a great degree. However to be fair, I've never actually used an iphone for more than a few minutes so I am not really the guy to throw stones at it, I'm sure they are nice enough and do what they are supposed to do well. I digress. I was forced to buy a phone last Monday because my GS3 died on me. I knew I had a week to go prior to the S5 coming out so I researched like crazy as I hate to be 'forced' into a purchase like this without really studying my options. The majority of the reviews on the MATE came back very favorable, not perfect but good. Considering I'm also not a camera freak (I mostly just set it to auto and run with it) I wasn't too worried about the megapixel dilemma.
I can tell you I am extremely impressed with the M8. It is smooth, lightning fast, great screen resolution, SENSE is a nice breath of fresh air compared with TouchWiz (*but I'm not 100% a fan of Sense in some instances), the build quality seems spot on for the most part and I'm digging the sound. The phone is slightly longer than I'd like - but I'm already used to it - no biggie. I think it is beautiful and it does everything I need a smartphone to do very, very well. It is definitely a step up from the S3.
About my only issue really is I have a bit of trouble getting used to the phone / contacts (people in SENSE talk) application. In the galaxy, you could swipe right for a phone call while on a contact, swipe left for a message and it was easy to toggle between favorites, contacts, and the phone. In SENSE, it just isn't quite as easy. There is a bit of a learning curve considering I was quite adept with the galaxy after 4 or 5 years. It isn't really a deal breaker though.
A co-worker picked up the S5 and she let me play around with it for a few minutes. It is snappy and looks nice...but it seemed a little cartoonish to me after using the M8 for a week. The colors a little too bright, the icons seemed a little bit off and it just felt odd in the hand compared to the work of art M8.
For me I believe I've made up my mind and I'm going to stick with the M8. Oddly - if I was to switch it would be for the Note 3 at this point simply due to screen size - I'm OK with the large screen and the internals aren't too far apart. But in a way, having to get used to SENSE vs. TouchWiz has been refreshing. And bottom line the S5 just didn't seem to offer anything different than my S3 other than the very noticeable speed difference.
Based on superior build quality and feel, the light and airy SENSE, super fast lag free operation and the vastly superior sound quality I believe HTC has won me over for this go around. Job well done HTC, thanks for creating such a beast in such a beautiful cover. M8 wins this time fairly handily.