I'd say Naomi or Matsuda, probably, although I personally relate the most to Near.

I find myself to be most relatable to L and Misa ^ ^

Just a regular guy...

we both have a dry sense of humour we both love video games we both don't care about the outside world and we both love Mello

And Naomi. They're similar in attitude. And I have it similar. But only because we've been hurt. Kiyomi has been hurt in life, you can tell. Sorry they all had lack of build up. I know what it is to love and be unloved. And it's not like I would stalk him. I'm not Misa. I would never tell him. And maybe, if it were to happen. I would suddenly forget all that pain. Kiyomi was a character who forgave Light. She was surprised of the call. She didn't want to go. But took the risk. I would've sent someone else, to see if it were some rapist or a joke. But she had a good heart. You can tell. She didn't want to judge criminals herself. She didn't want to commit crime, but she feared Light since ever he confessed. She was manipulated into his web. I'm a forgivable person myself. And I had trusted people before who had back stabbed me. But hey, life goes on. I'm not a person who holds grudges. Neither did she. She's free spirited, and she didn't hate Misa. They would've been good friends, if it weren't for Light's web.

He does almost everything in a different or odd manner. Honestly, a lot of us are probably similar to L in some sense, but we just don't make it obvious like L did.

I am goofy. I am sorry. Silly. Childish. Clumsy. Sweet and nice. Finds a way to be as useful as possible (even if its small meanlingness tasks). Loves helping and being a part of something. I'm intelligent but I'm also stupid at times. I don't always think things through. Not always sure right from wrong, good from bad. A bit naive. Funny. Loyal.
Etc. Etc.