Well the basic rule is:
Freestyle/Park = soft
Freeriding = mid
Aggressive/racing = stiff
Or you could also say its personal preference... Myself, I ride super soft boots and tie them loose and I like that in the park as well as charging or dropping chutes (thats just me though).
For the riding you described I would recommend a mid flex boot, something like you already had. Just make sure it fits. I've made the mistake of buying tight boots hoping they will pack out, not cool. Make sure they feel good from the start.
To elaborate though. A softer boot will give you more movement in your ankles and feet, better for pressing, grabs and anything where you need mobility and flex. You will feel the board more, and the snow. I enjoy that but they come with less support and your feet can also tire quicker if riding hard.
Stiffer boots will obviously be a little harder to press, and harder to flex so its harder to grab your board and do freestyle. That doesn't mean you can't though. They will help you dig into hard carves, support your ankles in chop and shit and help transfer energy into your board.
Personally I like to have the mobility, I have strong feet/ankles and I don't like the restraining feeling of a stiff boot, I find it easier to carve in a softer boot and I like to feel everything. That being said, there have been times where I caught and edge while crashing and jarred my ankle and that didn't feel good, a stiffer boot would have helped me there.
Hopefully that helps, I'm sure more people will chime in with their opinions.
Last edited by Casual; 10-03-2013 at 10:30 AM.