proxy or just go to a brick and mortar store. Lots of places that carry the boosters will carry singles.
I've played well before the planeswalkers but they look like shit.
Some of the theme decks I've made that I can remember:
Pestilence deck: based on
this in conjuction with
this and some prot black creatures like
thisShifting Skies deck: This one was fun just because it was so annoying to play against.
This was the main ingredient, with cards that affected entire colors like
this, which you could use
this on. It was white/blue and had a lot of annoying bounce/counter spells in it with mass removal.
I had a counter deck that was fun, tons of thrall and squirrel counters. I had a bunch of the 3 color dragons from Legends and some other newer set. I put them all in one 5 color deck and just tried to discard everything I could so I could
Living Death them all back.
I did have some very nasty competitive decks for when people took the game a little too seriously, but my group of friends were pretty laid back. My decks were more about trying some crazy shit that probably wouldn't work until a turn after I died anyway.
If you get enough people, Emperor is a fun gametype. Just don't allow anyone to make decks specifically for the Emperor, we had to ban two of our decks because things like
this and
this get a little too powerful.