Top 5
#1 Instosis - it's everything that's right about this game. The deck uses such exact card synergy and quanta count, and takes a subtle touch. When I first started playing it my win rate was horrible, but I gradually learned the subtleties against various FG's. Great deck, although I must say I've gotten bored of it as it's pretty predictable once you know how to use it.
#2 Raging Voodoo OTK - forgot who came up with the 'in your hand' OTK vs PVP, but I loved using this deck. Seems like more people are doing OTK variations now, but when I was using this is was usually unexpected by the opponent.
#3 Devtosis - I prefer my own version. Games go down to the wire, then slowly turn....
#4 Dippity Do Bow - my own version of an upped SoSer deck. Plays differently every time, so I don't get bored.
#5 Stop Hitting Yourself - SoW, Reflective and Quint. 'Nuff said.
And now my 5 least favorite....
#1 Immo Golem Rush - this deck never draws right for me, but I've sure lost to it enough times.
#2 SPLAT - another deck I haven't had much luck with..
#3 Ready, Set.... Scarab! Seems like tons of people are doing this in PVP2 now, and I'm getting sick of seeing it.
#4 Pandebonium - Great deck idea and all, but boring as hell to play.
#5 Any shard-based decks - I know I said I play a SoSer deck, but really the shards are so much more powerful and game changing than regular cards. I don't think game balance was taken into consideration when they were created. I wish there was a 'no-shard' version of PVP. They're fun, but should be restricted when necessary.