As a competitive wormer, I like playing:
Battle Race
BnG
Elite
Fort
Roper
Rope Race
Team17
Shopper (from time to time, only on Dogma City map)
All other schemes can die. Years ago when there were so many pros playing actively, in the times or CL2K and FB, these were pretty much all the schemes which were played so it made people get good at them all. In this generation of WA with schemes such as Plop War and Burning Girders no wonder so many players suck xD