Personally, I'm one of those people who dips their toes into Magic every few years and makes new decks, while keeping the old ones. I also prefer "Goofy" decks (I still have my "Squirrel" deck circa the Odysessy expansions.), or decks that offer Alternate Win conditions.
Except for the buying new stuff to dip back in, you just described me. The other M:tG players in our group have a name for the decks I design...."Tony decks" (after my real name)*. Ahhhh...the stories I could tell.
I wish I could help you, Grimmjow, but I simply am out of date.
* including a poison counter deck, Urza/Artifact creature/"Mill"deck, Red/Blue infinitely recursive creatureless, Mono Green elves, Rainbow, Rainbow Elves, Red/Black discard, Mono Green Echo, Mono Red creature-sweeper, Mono black Rats, Mono Blue creatureless, Black/White swamp walking, The Living Planes deck, and a Mono Black deck where no creature costs more than 3 total mana.
While I never won a tournament, i came close a few times, and some of my ideas reshaped the way the game was played, at least locally.