My situation is a bit different......
My relationship was sort of built off the fact we are both retro, and both interested in older things, though more of a musical nature (rock music from the 60's-early 90's) than technology, though she has been quite excited and happy at me gifting her vintage movie player hardware which I rebuilt, but we still have a lot of catching up to do.
She gave me a mancave, is (for the most part) supportive of both my hobbies and external sources of money (music), and she does have a small shred of "gamer" to her in that she enjoys playing Mario and Street Fighter/Mortal Kombat type games with me and occasionally wants to try her hand at pieces of vintage tech that mean something to her.
She has hobbies of her own and I'm planning to get us a house sometime in the next few years so that she can have HER own room too. Her big things are photography, decoupage, historical music research, cooking (which we both kind of share). Our hobbies collide once in awhile, my building guitars and her decoupage for instance.
About the only rift we have is over the purge I'm planning this spring. Part of so much activity upgrading things is because I'm trying to finalize my "spares & leftovers" so I can release some of those old parts to the wild (and focus on gaming and development and music production on my old hardware rather than constantly replacing this and upgrading that), along with some other things, so some other vintage computer/vogons people can make use of it. I"ve been collecting Vintage PC hardware for over 15 years now and have a LOT of 286/386/486 era stuff and some 8088 era stuff laying around, and I don't plan to use all of it, just keep 3 backup items of each type per vintage machine in case something blows (so I can learn to fix what breaks myself). I think part of it is the hectic schedule we have this time of year (my workload at work goes up, we have my birthday, valentines day, her birthday, and several other family member's birthdays all within the span of Jan-through March), the fact she does not realize I've been funding ALL upgrades by selling other hardware off, and the remainder is going into savings for the house. My goal is by summer to have the closet COMPLETELY cleaned out and organized in my man cave so I can start storing things there like my tools and spare parts without it all being a big heaping mess like it is right now. Biggest problem is we have so many interests people gift us all sorts of stupid trinket shit through the year and therefore clutter. The Local Charity thrift will be seeing a LOT of me in the next year - she just needs to see results to be happy about things again.