If you dont want to work, you get lots of money from the state.
People are nice, by which I mean that everyone minds their own business, as it should be.
Weather is nice. Summer is short, but beautiful
You can get cheap booze easily from estonia if you're into that. We call it viinaralli (which means literally boozerally)
I dont see any negative sides.
Travelling around is quite cheap and there are direct flights to many places because airport at Helsinki is growing to be a bigger hub day by day. So you can go spend your holidays in some cool places around the world and stuff if it gets too cold or something.
Food is good and cheap, you can get pizza for 5 euros in some places.
We have a good president, unlike some other counteries. Today he got elected for a second term.

(Not the dog, but the man left from him)
Fast speed internet is thing that everyone has in Finland. Data plans never have datacaps or such and you can get 100/100 wired connection or even 1000/1000 in some places for 20-30 euros a month.
Except if you live in the sticks. Then you might not have fast internet. But some states that are located in remote locations pay money if you make babies. They want more young people living in their areas so they pay you 10 000€ if you have a baby and move there (or live there). Some even pay you just if you buy a house from that state and move there.
Finnish as a language is beautiful and easy to learn. You pronounce it exactly as you write it and so on.
Nature is beautiful and summer cottages are cheap.
Health care is free as it should be, though you might have to wait for some time if you have something non-urgent to be fixed. I have not had any issues with public side healthcare, but some others have vastly different opinions.
Education was good, its not that good anymore. But hey, at least it is almost free.
The capital city has cool metro line. It was recently expanded after many, many delays. (And cancellation of the plan to automate the metro system)