Worth more? No.
I used to have a large collection, but I've since narrowed it down. I had, like, 15 different snare heads that I'd experiment with on different drums I'd buy to see what sounded good on what drums. I've come to the conclusion that lots of different heads have different characteristics, but the head that I'M most satisfied with overall is the Coated Ambassador. So, now I have a couple of those as back ups, and most of my snares are equipped with them. I also have a Fibreskyn, Renaissance, and Coated Dot for experimenting with new drums, but I usually end up liking the Coated Ambassador the best, so I go with that.
As for bass drum heads, I still have a few around, but most of my spares have gone to students. I like EMADs and SKIIs on my DW Collector's and 1970 Ludwig Downbeat, so the rest have moved on. I also just got a Fibreskyn for my 22" vintage Ludwig that I REALLY like. I have a few coated Ambs, an SKII and a ported reso for my 18" kick, and some Aquarian Modern Vintages for my 16" Roger's kick drum. I also have a small collection of resos...ported, solid, muffled, etc. in 20" and 22" sizes...
Now...the TOM heads are what I have amassed, due to the variety of groups I'm in and sounds I like. I've narrowed down my collection to a set of Coated G2s, clear Emperors, and clear ambassadors for my DW's 10/12/14/16 toms (for different studio applications). Also, I use Coated Ambassadors exclusively on my Ludwig 12/14 toms. I'm still figuring out what heads I dig on my 12/13/16 Ludwig toms...I have a set of Coated Emperors, Coated Ambassadors, and Renaissance heads that I've switched back and forth between a few times, not quite entirely convinced that one set is better than another. I'm gonna pick up a set of etched heads today for super cheap, which I've gotten favorable opinions on from other Ludwig enthusiasts...
So, yeah...heads are key to your sound. Here's a pic of, roughly, a fifth of my heads, just so you don't think I'm pulling your guys' legs (the rest are deeper in the closet, in other rooms, at the studio, scattered on the floor around my Ludwig kit, etc...). I have them organized by set and new/used.