With nearly 6k hours in Warframe (according to steam, but it's a bit less in-game) and playing since founder was a thing I can say for certain I have a fairly good grasp of Warframe.

▬For the game itself▬
Pros:
• Space ninjas with super powers! I mean what's cooler than that? 'Super hero' adjacent but better with an ever evolving story that I do so love. Plus the ability to mix 'n match powers makes for more diverse gameplay to make a frame more my own. They also do not exactly follow the traditional ninja we all know well enough, pretty much reinventing a new kind of ninja.
• The mods! What I love most of all is the mod system where like above but to an incredibly greater degree, I can design how the warframe functions in the field from survivability, to crowd control, to speed and more! Plus they do not effect the warframe's appearance which is another huge plus.
• The power creep. Being able to harness powers to delete things, or in my preferred case outlive any enemy is pretty satisfying to my senses.
• The grind. There is something satisfying about working hard for something you get. Like everything I've achieved feels hard earned and won. Without it being too excessive.
• Aesthetics (fashionframe). Nothing tickles my fancy more than being able to decide how my character looks to the degree I can in warframe. This plus the above lets it feel more like mine, being more personable--this satisfying sense of investment is what keeps me to it to this day.
• Tileset RNG. The main reason Warframe is so replayable is the tileset constantly changing what node they connect to next. It breaks up the monotony and static nature of most game levels you run through, renewing it each time.
• Level design aesthetics. From what experience I have, Warframe feels pretty unique to me in how the levels are designed, from other games I've played. And they only keep getting better!
• Solid community. Bad eggs aside, the Warframe community has always been a fantastic bunch of people.

Cons:
• The Power creep. I was never a fan of game-breaking levels of power creep, that take any real challenge away from gameplay. Where I enter a map expecting a rough 'n tumble fight with a boss and people running around me deleting everything before I can blink. This is a pro to people who enjoy that kind of gameplay, fair enough, but while I am no slouch and can smack some baddies fairly well.. that is a line I do not cross in any game I play. I just can't enjoy it. I want my prey to struggle!
• Speed frame. Sure gotta go fast 'n all can be pretty gratifying, but it feels excessive in warframe. I'm playing space ninjas, not speed racer ninjas. The biggest issue with speed turns a game with beautiful level design into a blur as people number crunch to do levels as fast as possible. I can keep up with them, but there is so much missed out on.. sure the kuria and other hidden gems can give someone reason to pause.. but with the game designed around speed I think takes away from incentive to put more gems into the levels. I mean why bother when people blur past it all? But it is what it is now and that is what people expect. Take it away and that could really flip the tables.
• The grind. I never had a problem with the grind until some gear required special items to restart their levels before you gain mastery from them, it made the grind utterly punishing for me. Working twice as hard to get the reward you should consistently get from the first run from 0 to 30 for a single item? That really put me off pretty badly. As I've gotten older I have less and less time to play it, less desire to grind, let alone double-grind.. I rarely play these days. The amount of grind really killed Warframe for me, by hitting a point of excessive. Yes it keeps people coming back and playing, which makes money. But I just can't.

▬The Devs▬
I love you folks. No complaints from me. I especially love that one devstream where someone was.. I suppose 'concern trolling' the mods, trying to insist mods are a dumb idea.. everyone on the stream look so defeated until someone stood up and put their foot down, putting that stupid 'fan' idea in its place. I'm bad with names and don't watch streams anymore, so I forgot his name. But that really stuck with me, as so many game studios make stupid decisions based on bad ideas and advice from players, or others only to ruin said game.

The fact you stood up for your game and called out that nonsense left me respecting you all more than any dev team I've encountered.

Plus you're just /people/ working on a passion project. Relatable and appreciable.

Compared to other devs doing devstreams being smug, shallow.. all glitter and no substance, it really means a lot to just how awesome and down to earth you all are.

My wife said if this review gets 50 likes and 5 awards, she will buy a case of beer, guys help me out.

I like being a teenage space ninja killing everything because space mommy said so