if you feel it's good luck you can but it's not necessary. I have a lot of dragon statues but i like them, not because they're pagan. i wear a pentacle necklace and finally have space for a permanent altar, but you don't need one.
it really comes down to personal belief. some follow feng shui when designing a room, others hang crystals for certain energies, some hang dream-catchers by their bed, or places protection symbols by the door. i've even heard some people who believe colour can effect you. if you have a room that's all blue [for example] this could supercharge your throat chakra. [i've read a few scientific studies about colour effects ones mood, so i guess it's possible] but at the end of the day it's whatever you believe in. if you believe a statue brings luck, use it, but don't just clutter your room because 'its a pagan symbol, therefore i need it' too much stuff [i feel] can effect the flow of energy and make you feel bogged down.