I stayed up all night playing twice in the last week or two

Good job, no game has managed that in 6 years. That being said, I'm getting really sick of dying to bosses at the last second. Seriously, it's always their last chunk of health they go nuts and just delete me. Very very frustrating feeling when I always die so close to winning.

I can recall beta Minecraft and when Skyrim launched being games that took over my life when I first got "into" them. PoE2 puts me to sleep sometimes, but maybe I'm just getting too old. Glad you're having such a blast tho. I like this game a lot (or at least what's there so far. Looking forward to seeing how it develops over the next 2-5 years).

For bosses, if you're getting wiped by their low-life mode (I think it's around 1/4 or 1/3 hp left, sometimes 1/2 it feels like but I probably just suck) try figuring out how to increase your damage. GGG says they want more methodical gameplay but the reality of the game design says otherwise. I try to avoid one-shot builds and make my dudes as set-up/pay-off as possible but it's really rough when there's pretty much always the risk of getting 1-shot yourself. Like last night I finally caved and bought some +melee gloves and it's like night and day.

Glad you enjoy it.
0.3 release i stayed up 40h =)

Last phase of bosses are the hardest. You indeed want more DPS if you struggle too much.
Now dying a bit is normal when you first try them dont worry.
I died so much on my first charactere it's amazing =)
I hardly die anymore now. Because i know them pattern. You'll get there sooner than you think.