Well i would agree with Sanjay Chandra here, the update cycle is very very slow in WP8, forget app updates or new apps, we barely have had a OS update which will fix a visible OS bug, i don't want under the hood improvements! I want those million tiny bugs sorted out, most basic features available, more games (& apps) avaiable rather than the updates which seem to do nothing but change the OS version number.
I used Symbian 60 & Symbian^3 for a long time, then finally switched to WP8, that too because of Nokia, and frankly, even though i like it a lot, my next phone probably wont be a WP(unless it has 41MP Pureview + OIS). I used to cook my own CFW (Custom firmware/ROM) for 5800, and seriously wanted to go for an android, there was so much potential to do customization at the kernel level itself, but i trusted Nokia with WP8, and WP8 has been a let down. Now i think i should've bought a 808.(even after my first 820 stolen, i did not understand god's wish to make me buy an android/808 pureview, i again bought 820). Lets see what will the so many planned updates improve and if they are enough to make me stick to the platform in future.
i used nokia c7 before sifting to windows long back...i loved the os! In fact after belle update i was ready to use it for little longer but the constant reboot and network error was getting annoying and more frequent so i finally gave up using Symbian..i don't know if all Symbian phones have this problems but its very annoying..