I started to read Marvel comics in 2009 with Marvel Digital Unlimited. I have never owned a physical Marvel comic book. I try to keep up with Marvel but MDU is about 4-6 months behind so I'm usually playing catch up.
I didn't start reading DC until the New 52 launched. I have every new 52 issue of Batman, Detective Comics, Batman and Co, Superman, Action Comics, Superman Unchained, Flash, Green Lantern New Guardians, Justice League, Earth 2.
Also have the 1st 2 Trade Backs of Aquaman.
I also have some trade backs pre 52 including the Black Ring arc, Reign of Doomsday, Return of Doomsday, Batman Arkham Unhinged 1, 2 and 3. Revolt of the Alpha Lanterns, Weaponer, War of the Green Lanterns and Aftermath, Emerald Warriors, Brightest Day and Flashpoint.
I also have the Flash Geoff Johns Omnibus Vol 1, working on getting Vol 2 and 3
However I started reading comics in general in the early 2000's with Sonic from Archie. I have Sonic issues 150-current, I have Sonic Universe issue 1-current, I have Mega Man from Archie issue 1-current.
I also have every issue of the Pokemon Black and White Manga.
No figurines though. I always get too tempted to open them up.
The Exact number of physical books I have I have absolutely no idea.
Behind me in my office I have a five foot tall book shelf, with four shelves that has approximately 400 to 500 comics across each shelf plus two deep and about 10 high two deep three across laying on top of them. I have a further 8 boxes in my attic and 10 at my fathers place which I'd say each have around 200 to 300 comics in them. I stopped buying physical books in about 1999.
On my computer I have about 90GB of comics and on a second external drive another 400GB.
Bare in mind I'm 55 and have been buying comics since i was 14. From 1985 to 97 I would on average buy 50 comics a month ( courtesy of being hooked on titles I could buy in anthologies prior that I now hod to buy 5 comics to get them - of course this also meant I HAD to get my hands on the original us versions as well). My collection includes
All Star Comics ( missing 6 issues)
Adventure comics issues 60 to 79 and 146 - 503 ( missing IIRC about 9 issues in those numbers)
All American from issue 15 to 102 (missing 48/49/50)
Avengers 1-181 ( think I missed about 10)
Defenders v1 1-152 plus V2 (New defenders)
More Fun Comics 55 -77
Complete runs i have just off the top of my head.
Booster Gold ( both runs)
Aquaman v1, v2 (reason I ahve so much damn adventure along with JSA)
JLA V1, V2, JLE, JLI Extreme Justice etc - didnt get all JLTF care factor zipp
Daredevil up till 95)
Pm and IF
Heroes for hire
Blue Beetle ( ted Kord one and most of Dan garret)
Mighty Crusaders (MLJ not crappy DC knock offs)
Black Hood ( also MLJ)
Captain Atom
Power of Shazam
JSA ( both runs plus 5 minis)
Green lantern, Green latern/Green Arrow and GL up till a few years through Kyle run, plus GLC quarterly and other
Actions and Superman etc from 60ish up till a few months after death of Superman (tuned to crud and never went back)
Batman, Batman Family and Detective from around the same up until year one (hate when they tuned him into Bat god)
Blue Devil
Dr fate ( four series if you include those of Jarred Stevens Fate)
Dr Strange
West Coast Avengers
Xmen from about 78 to 95
Legion/rebels ( all runs)
Legion of Superheroes ( up till three boot)
Hellblazer ( up till 237)
Marvel Spotlight (when Hellstrom was feature and a little longer)
Son Of Satan ( 75 run and 90's and 2007 minis)
Infinity inc
All Star Squadron/ Young All Stars.
Starman ( both the Will Payton series and the Robinson run)
Justice, PSI Force and DP7 from marvel New Universe.
Shadowpact
Suicide Squad
Teen Titans ( wolfman Perez Era)
Green Arrow ( Grell Era)
Also a shite load of Australian reprint Anthology titles of DC and Marvel comics pre 1985. Before 85 80% of comics were reprinted by Australian publishers in anthology form because of protection laws. Which used to mean I could read the adventures of five different characters in a single 120 page comic for 90 cents. While i hated that most of it was black and White I miss how cheap it was to read comics back then. I know there is a lot more ( for one thing I haven't mentioned half my Marvel stuff or other companies like 2000Ad, Cyclone etc) but you get the idea- I don't have a life.