The type 2 fun person does not run on normal time. There are only 24 hours in a day and that is never enough for their next adventure. You will become familiar with the time of day that exist when everyone else is still asleep. Driving to the trailhead before sunrise or better yet getting there the night before will become the norm. Waking up with the sunrise is a luxury that can not be afforded for the hardcore adventure.
#2 Relationship Therapy-
Ever heard someone talk about putting together a IKEA dresser with their significant other? Imagine that; but you are freezing, it's raining, you don't know where you are, where you are going or what you are doing there. That is the type 2 fun you will get into with your partner. The type of fun where as you trot along behind them you are wondering what it would be like to date someone normal. Someone who stays home most weekends and who views starting a new Netflix series as big adventure. Then the cold will snap you back.
#3 Repetitive Stories-
Inevitably you will have to listen to the same 'epic' story of their latest adventure around every campfire you share. Often times you will be asked/encouraged to spice up the story with your input of suffering. The more suffering the story has the more often you will have to hear it. Additionally you will have to sit through the same questions that everyone asked and listen as he/she answers with bravado.
Bikes, crampons, static climbing ropes, dynamic climbing ropes, trail runners, kayaks, handhelds, 20 degree sleeping bag, 40 degree sleeping bag, fucking freezing sleeping bag, and the list goes on. This shit will all end up at your place when you move in together. Just plan on sacrificing one of your spare bedrooms. "But we can just move to his/her place" you say. Unless your idea of living in a truck, camper, or someone else's couch is your idea of privacy I would just lose that fantasy.
#5 Wear and Tear on Your Vehicle-
So you both own a car, why would you need to drive yours? Having two vehicles only validates the option to use a spare vehicle as a drop vehicle. You have to leave a car at the end point for that next 50 mile two day trip which will require you driving out to do the car drop Friday evening after your 10 hour shift or waking up at 2AM Saturday so you can drop a car and make it to the trailhead before sunrise. Just plan on racking up serious mileage on your vehicle and probably needing a new one way before you planned. But don't worry your adventure partner will probably buy your old one to convert it into a dirtbagging vehicle. Just be prepared when they approach you about a 6 month hiatus from work to visit all the national parks within 500 miles.
#6 Closet Space-
If you thought the gear was taking up too much space wait until you see the wardrobe. Specialty pieces for running roads, running trails, biking roads, biking trails, climbing at the gym, climbing outside, bouldering, kayaking, fastpacking, backpacking, day hiking; just to name a few. They will most likely own more shoes than you, as every outdoor discipline seems to have it's own specialty pair. If they are runner, forget about it!
#7 Redefinition of Quality Time Together-
Just accept that the only time you two are going to spend alone is when you are bagging a peak in a snowstorm. The only reason you are rewarded with this quality time is that you were the only dumbass they could find to join them. This shouldn't be viewed as all negative though, you do have the emergency bivy to look forward to when you can't descend tonight. Think of all the quality cuddling you will get when you are trying to stay warm enough to survive the night.
#8 Paying Rent for Nothing-
With the next 6 months of weekends filled up going on trips, you are basically paying rent to store your things. You may even forget what your bed looks like. Don't bother buying any furnishings, you won't be having a social life unless it revolves around a campfire. It may not be a bad idea to just sublet your place to fund the maintenance cost on your vehicle.
Be prepared to be introduced to a plethora of lingo that spews from your partners mouth. "Those death cookies up that line were total gnar. I practically took a digger." "After the initial dyno, you have a fist jam, followed by a series of jugs. Then after that you hit the crux with a slope and a mild stem to top out." Keeping track of all the lingo may have you reminiscing about Spanish class from high school. Don't worry though, given sometime you will pick up on it or just learn to nod your head convincingly enough.
If you are left home from one of the many adventures you will most likely be wide awake wondering if your partner is alive. You will most likely keep refreshing their Spot Adventures page hoping for an update. The detailed emergency plan list they left you provides no reassurance for an uneasy mind. Don't worry though, it could be worse. You could be right there next to them......night hiking on non-existent trails, searching for a trail through fresh powder, or trying to top out by moonlight. After some time these worries will dissipate and you will be able to sleep--but no guarantees about your dreams.
Eventually you will not notice the negative aspects of the relationship and will begin enjoying type two fun. You will see them for all their glory...the good, the bad, and the crazy.