Mh...
Glass - very enjoyable flow, no awkward angles, patterning feels very intuitive and features and supports the mapped songs very well
Natteke - aditive hitsounding and mapping, supporting and carrying songs to more than they even got originally without making stuff feel any awkward or pushy; also, neat jumps and jumppatterns and a good mapper overall in points of supporting, following and carrying atmosphere of a song
La Cataline - you could say, add Glass to Natteke and make it be female and you get this; La Cataline is probably one of the most cherished mappers on here and there are reasons for it, though I do not always enjoy her choice of songs
happy30 - that is somewhat hard to discribe, it's the vibe of the maps, especially the Demetori ones, that makes his mapping so memorizable and recognizable, you will notice a happy30 in a map, no matter if it's announced or not, you will notice it by the thing you can't discribe but you know it's him mapping that part or diff
James - probably one of the most important people in osu! history, along with Rolled; very good and enjoyable maps, intuitive ideas and well thought-out overall mapping, better than likely anything you will find among common mapping and that though his maps are mostly old as the poot itself
Shinxyn - good old Shinxyn-2010 stylish jumping, my favourites there are Messiah and Fire
S i R i R u - fitting SBs and suiting the songs quite well, also neat to play without needing a challenge there because of the fitting overall impression which can partly get really adictive; also, the selfmade skins are just neat for someone like me who wants a map to suit the song with every bit in it
tsuka(-maete) - inventive as shit, especially the old maps; always was likely THE mapper to bring something new, unexpected and though fitting and featuring to the song mapped
nold_1702 - nold's a weirdo. he really is. his attitude partly is total shit, he himself is likely one of the most what-the-fuck people I've ever known, including me, but he still gets to creating enjoyable stuff, though it mostly is overdone as fuck, it still feels somewhat fitting and I can't really bring this one to a point