I have some maps I'm really proud of, and some other that turned out ok but don't shine to me :< Here's some of my best works from my own point of view, if you're interested:
Hatsune Miku - Test Tube Princess (ranked) Probably one of the first mapsets i was proud of: cool difficulty spread and a weird but challenging insane (fast sliderssss). I still like it nowadays even though some parts may feel weird.
Enya - Book of Days (ranked) My second map with a song from Enya. It looks so simple and polished and it's very relaxing, i really like it even though i didn't make anything big in this one.
Amane - exist except (ranked) This is a collaboration i made with happy30, Dangaard, ignorethis and Mafiamaster, my favourite touhou mappers. The map layout is pretty simple, but these guys made an awesome job with their parts and everything merged incredibly well.The Storyboard is a nice touch as well.
ZIZZ Studio - Song of Saya I (ranked) A slow paced song, but with creepiness as a bonus. If you know the game it comes from, you'll surely enjoy the storyboard and the soft hitsounds, as well as the simple layout for the difficulties.
I Cavalieri del Re - Ransie la Strega (ranked) The italian opening of Tokimeki Tonight (Ransie la Strega in Italy). A cool experiment with multiple video and some old-styled strobes. I overall like how everything turned out here: simple, mostly symmetrick, and fun.
Masami Ueda - Shinshuu Plains (ranked) Probably my most complex and most amazing storyboard. The song is from the Soundtrack of Okami, and it's a mixture of two songs merged by me into a song of about 3:30. I dunno how i made that merging in such a perfect way. The hardest difficulty is also a little tribute to a certain mapper who inspired me.
kors k - smooooch (ranked) Another mapset i really like. I made a little experiment by masking the video and making a frame around it, with a bit of storyboarding and it turned out really nice. The difficulty spread is great and every diffficulty plays and sounds great (especially Hyper). I only feel bad at having forced default hitbursts, i really regret that.
Kohta Takahashi - Lode Stone (ranked) For some reason, i find something special in this mapset. Maybe it's the song choice, maybe it's the simple yet quite cool SB, maybe the originality of some patterns i made. I just like it.
Susumu Hirasawa - Forces (ranked) HELL YEAH SUSUMU. I wanted to map a song from him and Forces (lol@coincidence with my nickname) popped out by listening to some of them. Map is packed with a really cool SB and a good layout of difficulties.
Len Kagamine - Kokoro Kiseki (ranked) My own tribute to a specific map from Al-Azif. I really really did my best by adding some citations to the original mixing them with some new things of my own. The overall result is great to me, I'm really happy about how it turned out.
Kana Hanazawa - Ashita Kuru Hi (graveyarded, unrankable (?)) This is what i probably consider my best map ever up to now. Nice and slow paced song, storyboard and skin that totally fit the song, small circles, simple and nice patterns, cool hitsounds and usage of multiple tickrates to make everything sound even greater. If you like slow paced songs, you have to try it.
Lisa Miskovsky - Still Alive (ranked) The main theme of Mirror's Edge. My intention was to reflect the futuristic and metropolitan look of the city in the map, and i believe my patterns did a good job for that. The SB is quite simple but fits very well (especially the last part where i used a little trick to add a feeling of perspective).
Gli Amici di Lupin - Lupin l'Incorreggibile (graveyarded) The italian opening for the TV animation of Lupin the 3rd. Simple job with the SB here, but i generally like the overall layout of every difficulty i made here. Nothing special but polished and fun to play.
Hernan Rozenwasser - Today I Die (Piano Mix) (ranked) This is quite a big project. I entirely remade the original game into the storyboard and the song covers every single moment of the game. The usage of a particular custom hitsound makes the middle sections really creepy but also really amazing.
Megurine Luka - DYE 2 (graveyarded, unrankable) Made up by an "art" difficulty and an intense but still playable difficulty, it was more an experiment, but still turned out quite nice to both watch and play.
Amane - Embrace to Dream (graveyarded, unrankable) The description for this is "sudden inspiration". Mapped within a few hours in a long run, i think it's somehow unique, with hints of other mappers' styles.
Hatsune Miku - Testes broadcast.proj (graveyarded WIP, unrankable) An improvement of smooooch's video trick and a very polished map with some geometrical patterns and a late-2009-ish style. The patterns feature overlaps and symmetry.