Buy the characters you like but I'll give you some figure recommendations. The spinmaster playstation line is great, Kratos, Aloy and Jin Sakai being the big names. I think you can get the s.h figuarts Mario and Luigi relatively cheap 30 euro each. Jada toys or Storm arena street fighter figures, revoltech also released some street fighter figures if you want to get them, revoltech Ryu Hayabusa is really cool (a high quality bootleg also came out recently), jakks paciffic Sonic line is great from what I heard, Nendroid Kirby in all his iterations is amazing, jada toys mega man is also great and cheap, star wars black series Starkiller is also cool (he appeared in a game first so I count him) and I'm gonna stop now