The Finnish press (Ilta-Sanomat) writes today: "easyJet's flights between Gatwick and Helsinki became so popular that the carrier had to replace its planes with the bigger ones".
Good. However, it's not a surprise for me. After all, Finland is still the least LCC-saturated EU country.
My hint: try HEL-ARN (kind of monopoly on this route), try SXF(!!!). Above all, try some Southern destinations (no low-cost flights so far, nobody offers them here).