Real Syaoran is my favourite because he is the
original and has the exact same personality of the Syaoran we knew from CCS. The clone, before he went crazy, was a little too perfect and I found him a bit dull (sorry clone fans ><) - he just didn't feel like Syaoran. The real one has faults (like angsting loads, not saying very much and being a bit grumpy) so he seems more realistic and i personally find him much much more adorable because of it. Ooooh, plus, he's really mysterious (I can't wait to find out his past!)
I've loved him ever since he appeared, and that scene with Kurogane, Syaoran and Mokona when Syaoran got drunk and fell asleep is just total love <3
I really hope he gets some happiness by the end of the manga - the poor guy has been stuck in a tube half his life watching as his copy lives his life for him (like Mokona said - he must have felt so lonely) - its really sad
I think I might actually cry, go all depressed and stop reading trc if the real one dies and/or does not end up with Sakura.
Although, I must admit the clone with his one blue eye and psycho-ness is teh smex.