Well, the list ends up much more impressive than I thought (and than other years). I blame all of you, obviously. You're a bad influence.
Note that I bought most of the pedals used and for quite cheap (lots of good deals to be had locally especially on older pedals). The only pedals that cost more than $100 were the SS/BS ones I think, and most were definitely less than that. Also, selling/trading cheap pedals is usually not an option for me because of international shipping cost.
As for the modular, it took me more than 3 years to get to a 7U case and it's not even full. I'm doing much better at controlling my purchases than most people I know

. I sold some synth stuff too, which financed some of these.
So, the list (in more or less chronological order).
Pedals :
SS/BS Mini (2015 black friday natgeo edition late arrival)
Traded BAT Black Forest for EQD Dispatch Master
Moog MF Drive, traded for a second SS/BS Mini (etched)
Pearl PH-03 phaser
Yamaha COD-100 CMOS overdrive
Boss RV-3
Maxon BC-01 bi-mode chorus
Maxon DM-01 multimode delay (same as Ibanez DML-20)
Boss PS-3 x 3 (yeah, three...)
DOD FX22 Vibro Thang
Hotone Bass Press volume/wah/exp
Soon : SS/BS Buzzz (ordered for 2016 black friday)
Synths :
Korg Volca FM
Eurorack :
Microbe Modular Equation Composer (12HP) -> I got this for free and need to finish and release my custom code for it
Intellijel 7U case + Quadratt 1U module
Erica Synths Pico Sequencer (3HP)
Erica Synths Pico VCO (3HP)
Meng Qi DPLPG (2HP)
Music Thing Modular Mikrophonie (4HP)
Studio Electronics Router (2HP)
Best :
SS/BS Mini, my favourite dirt pedal. I have one for synths and one for bass/guitar now.
DOD Vibro Thang, seriously awesome mix of tremolo and phaser.
Boss PS-3. I got 3 of these, really versatile little things
Volca FM, great sound and perfect to take anywhere to make music for my son (only 5 weeks old now but he seems to like arpeggiated basslines

)
7U case (much nicer than my previous one)
Worst
MF Drive, couldn't get much interesting things with my setup
Black Forest, sucked balls for me because I don't use a real amp