I did mine about 7 years ago playing badminton. Similar experience to yours in that I looked around to see who had hit me but no real pain afterwards. I went down the surgical route because the risk of re-rupture is far higher with conservative treatment. The downside of the surgical route is the greater risk of infection. This is a major problem because the achilles is very poorly vascularised and infections in this area often never clear-up; antibiotics just don't reach the site of the infection. In my case bacteria got into my achilles during the repair but didn't multiply to any great extent until six years later when my leg "ballooned" (half-way through my SMBLA course). Unfortunately and entirely co-incidentally i was diagnosed with Hodgkin Lymphoma at around the same time and because I couldn't start chemotherapy with an infected wound, the whole achilles tendon was removed. I had it reconstructed nine months later (last August) using the Flexor Hallucis Longus from my big toe. Anyway, this is the second time around for me and my top tips would be:
Early mobilisation–get moving as early as the orthopod will allow you.
Listen to the physio and do the exercises and stretches they prescribe as regularly and for as long as you can (not so that it's painful but it can be "uncomfortable"). The cross-tissue massage that they get you to do is really important (first time around it was introduced to me as a bit of an afterthought) it is used to break down scar tissue. Do it as much as you can to avoid lumps of scar tissue that can rub against your shoes later on. Cycling as really good, I was able to get back on my bike before I was able to walk properly. Get hold of a turbo trainer if you can, also a wobble board for getting your balance back.
BTW, infections appearing years down the line like this are incredibly rare so don't be alarmed. I have just been given the go ahead by my physio to get back on my bike so I'll give it a go this week. Hope it all goes well for you,
Jonathan