In addition to what was said above, remember that for most people, you'll be shutting the door on some lenders for the better part of two years. Chase and us bank being the favorites around here.
Some other great points were made. I would add that if you plan on applying for a mortgage in the next 12 months or so, all of those hard pulls and new accounts might smack your Fico home score pretty hard, if you don't have a super thick file. That being said, I live my life on the verge of an app spree so I feel you. If you can tollerate the potential score drop for 6-12 months and you don't care about Chase/US bank, go for it, and if you do go for it don't forget to post an update!
Maybe I can live vicariously through you on this app spree.
The best advice I could offer if you choose to move forward with something like this....
I've done a 4-card, 1-day spree once, and it was after a month of information mining and advice from MyFICO'ers. The key for my spree was determining the bureau that each lender pulled from, how sensitive the lenders were to inquiries and new accounts, etc., and the best order in which to apply given those factors. Each of the 4 cards were meticulously chosen for their cashback benefits and 3 still fit my spend now. (Barclay Uber was nerfed and later product-changed to the View, which now currently functions as a sock divider.) And I do freely admit, there is some level of excitement with a spree, but....
Just do your homework. Don't blindly start applying for A, B, C, D, E and F cards without some level of planning. Personally, I think 6 cards is pushing the envelope, but to each their own. And I can't really relate to obtaining credit cards as a collector's hobby.....perhaps you might evaluate a bit more if A-F cards are really beneficial to you before you tank your credit. Whatever your choice, best of luck to you....
On Deck: Possibly Aven 3% Visa
@CreditKick wrote:So, I've kinda started treating credit card collecting as something of a hobby....however, I also realize one needs to be somewhat careful with it. Currently waiting for an x1 invite... requested it about a week ago. Fico8 right now about 791 791 and 808. New accounts are 1/6 (CSP), 2/12, 4/24, with one other hard pull for a cli about 12 months ago. I'd like to do a spree once for the fun of it. How much damage do the gurus here think I would take if I applied for maybe 6, and managed 4-6 approvals?
In general, I don't recommend sprees.
The buzzer that goes off for me is your Chase Sapphire Preferred card, recently acquired, a valuable premium card you wouldn't want to jeopardize. Chase follows up on accounts, and doesn't like credit sprees after issuing a Chase card. They've been known to close accounts after a subsequent spree. How much time you need to wait before you're off their radar is a question I can't answer; I'll leave that to the Chase experts.
You'll lose plenty of points in the near term, when you rack up inquiries, reset your age of newest of account, and lower your average age of accounts.
But as others have said, if you're a risk taker and want to have some fun, go for it. You've earned the right 
I can say this. I did one but by "accident" (details are in other post here, involved Truist) where I got 8 new cards in 30 days with around $64K total new starting CL's and it dropped my FICO scores 45 points across the board. No way I'd ever do it again, even in the name of science and because of it I'm Farmer Brown tending to corn and tomatoes for a couple years in the biggest garden around.
Also as to the X1 you just emailed for an invite. Unless someone shares a code (which is a huge no no on here) with you be prepared to wait. I've been waiting over a year for an invite.
