So I'm thinking of buying myself an HTC One S. By December I should be able to purchase one. Factory Direct sells them for like $300 or whatever, and from all the research I've done, it sounds pretty good. I looked at other phones like the HTC One and all of the newer, better phones, but I don't want to pay upwards of $500 for a phone just yet (I only go prepaid). 
So, anything that I should maybe be made aware of? I know that there was the home screen button issue but my current phone has similar problems due to water damage... I don't want to deal with those problems again, as God it is annoying. However it only seems to be in the UK, and I'm in Canada.
What kind of case should I buy for the phone? I'm thinking like an Otterbox or something as I've seen that it's pretty thin and I don't want the screen to break. I can be kind of rough with my things (I have an unfortunate tendency to drop things, or place them down in such a way that they go careening to the ground, or once I even placed my phone in the middle of a tall dresser, and someone scared me when I was standing right next to it and I accidentally hit it in such a way that it went flying off of the dresser and onto the ground...).
!
Has anyone that has this phone found that it's very easily damaged? Like I said, I have a spectacular ability to break things even when I'm trying my hardest!!!
Tl;dr: What problems should I be made aware of, and what kind of case should I buy for the phone if I get it?

So, anything that I should maybe be made aware of? I know that there was the home screen button issue but my current phone has similar problems due to water damage... I don't want to deal with those problems again, as God it is annoying. However it only seems to be in the UK, and I'm in Canada.
What kind of case should I buy for the phone? I'm thinking like an Otterbox or something as I've seen that it's pretty thin and I don't want the screen to break. I can be kind of rough with my things (I have an unfortunate tendency to drop things, or place them down in such a way that they go careening to the ground, or once I even placed my phone in the middle of a tall dresser, and someone scared me when I was standing right next to it and I accidentally hit it in such a way that it went flying off of the dresser and onto the ground...).
!Has anyone that has this phone found that it's very easily damaged? Like I said, I have a spectacular ability to break things even when I'm trying my hardest!!!
Tl;dr: What problems should I be made aware of, and what kind of case should I buy for the phone if I get it?