In this decade =/= since Covid-19, I think I like

UMK the most in terms of "ordinarry National Finals". The songs are very competitive, modern, artsy-fartsy and we got some very beautiful ballads. The performances usually are top-notch and well-staged. It's crazy to believe that just a few songs compete (e.g. 6 or 7 and I usually love 2-4 out of them - 2020-2021 were a bit weaker than 2022-2025, though)
I would like to add

MGP as well but I'm baffled how tremendously generic and bad this year's edition seems to be whilst the quality and variety of recent editions were incredible.
I agree with
@mauve and
@goncalovieira on

and

- Both countries had a massive glow-up regarding their NFs.
I'd also add

to conclude my Top 5 (great production, some catchy and competitive entries [which don't make it to their Final]).
Since 2021 I purchase 3-6 songs per edition (from Festival da Canção) to create a "Best of Portugal" playlist. Some songs are truly beautiful! Edmundo Inácio's "A festa" would have been my #1 in ESC.
Sanremo

is in a league of its own. I'd probably put Italy on top, though.. so that's my Top 6 regarding NF's since 2020:
#1

Sanremo
#2

Uuden Musiikin Kilpailu
#3

Vidbir
#4

Melodi Grand Prix
#5

Festival da Canção
#6

Pesma za Evroviziju
Based on my taste in music, I think that

(all editions),

2022 and

2022 were the worst in this decade so far. Benidorm 2024 was very close but it got saved by great stagings, imo.