My experience with Malazan was this:
Enjoyed Gardens of the Moon in a Bloodborne kinda way (in fact, it's got a striking number of similarities to the Souls series in terms of lore and atmosphere), where I went along for the ride and didn't particularly mind being lost. My main issue with the book was the characterization. I had trouble telling one character from another.
Deadhouse Gates was such a huge improvement over Gardens of the Moon that I could hardly believe it was written by the same author. That's not an exaggeration. Erikson's prose improved dramatically during that decade-long period between books. In turn, his characterization was much better, and I got a better sense of a few recurring characters' personalities after one or two lines in DG than I did in all of their appearances in GotM. Deadhouse Gates is morbid, gritty, and I loved it. I'm also a sucker for desert settings.
Memories of Ice is another improvement on the writing front, and it features some of the best battles I've ever read in a fantasy series. However, I am not a huge fan of the main Bridgeburner crew, and didn't really care to read about Paran and Whiskeyjack again. I'm one of the few who really liked all the new characters in Deadhouse Gates.
During Memories of Ice I started catching on to some of Erikson's writing quirks and recurring themes. I could sense how each story was going to be setup in future books. I grew tired of the philosophical musings by every character, big or small. When I learned future books have even more philosophy it instantly soured my intention to read the rest of the series. Basically, I knew what I was getting into, felt like I experienced enough of "Malazan," and made a deliberate effort to stop after Memories of Ice. I spoiled the remainder of the series for myself and all my fears came true. That even at the end of the tenth novel, many readers still asked, "Wait, what was all this about? Who is the Crippled God again?" That's not clever or interesting writing to me.
Now, I see Stormlight Archives brought up a lot. I really do think ASOIAF is an ace series, and you can tell because it attracts a wide range of discussion about the world, about the characters, their intentions and so on. It isn't just, "Which character is more powerful?" Is Stormlight like this? Does its plotting compare to ASOIAF? Does any series have plotting that encourages such rich discussion and fan theory (aside from Harry Potter and Lord of the Rings)?