I have all the Target books, the first dozen or so New Adventures, and a few other New and Missing Adventures, in a box in the roof.

DWM from issue 83 to approx 1992, then from approx 2000 onwards.

All classic DVDs. A lot of classic VHSs.

Most new series DVDs (mostly unwatched!).

A remote control Dalek from 2005.

A Tom Baker tshirt.

Sundry other books (Tom, Anneke, Matthew Waterhouse, Mary Tamm, Nick Courtney autobiogs).

Most of the classic DW annuals, in a box in the roof (including most of the rare/valuable ones: three cheers for 1980s school fetes!)

The first 20 or so Big Finishes (coming soon to Eay, i should think)

Squillions of autographs.

I never got a Tom Baker shirt, but I do have a Paul McGann one and a Seal of Rassillon one, and as far as autographs go, signed photos of Colin Baker, Sylvester McCoy, Lis Sladen, Caroline John, Sophie Aldred and The Two Doctors/Blake's Seven's own Jacqueline Pearce.

Nothing wrong with Buffy Sharon, I've got a 50-year old mate who's an accountant & he's totally into Buffy - he has a thing about SMG.

I'll get round tov posting what I've got up soon, it's not quite as lengthy as many on here but is quite unusual in that a lot of items are signed.

most of the Target novels, most of the videos, all NuWho on DVD and assorted annuals, remote control Daleks etc. Not really a collector extraordinaire ala Tingramento. However, 2 most prized possessions are my autographed pic of Tom Baker as the Doc (from 1976, at the height of his fame) and a lifesize Dalek which sits in my living room and is the biggest talking point you could ever have!!

You win.

David J. Howe, probably (he wrote a book about DW merchandise).

It's rumoured at least one big-name Doctor Who fan has copies of lost episodes that he won't share with anyone else.

Who could you possibly mean?
(clue: it's not me)

lol - but I think Tingramento gets the nod without a doubt for sheer volume of stuff!!