My son will be two in January and he has the same personality as your son- What I have been doing is:
I bought him this potty chair a few months ago
http://www.fisher-price.com/fp.aspx?st=2002&e=demo&am...
It was only $13 at Walmart, and it is great! It's cute, basic, and since the front is so high there is no danger of a boy peeing over the edge. My son wears a 2t right now and I expect that this will be a good size for him until he can sit on the toilet.
I let him sit on that for the past few months when he wanted and occasionally I would sit him on it...with clothes usually, or right before or after taking a bath when he is naked, and a few times I took his diaper off and sat him on it. He peed accidentally while sitting on it a couple of times, and each time I cheered and showed him the pee when he was done and said "you went pee in the potty, good job honey!". While I am with my son, he always comes in the bathroom when I go to the bathroom so that he can see what I am doing and is comfortable with being in the bathroom. I've also been talking to him about his diaper, when it is wet and when poopy. Before changing him, I ask him if he is poopy and he nods his head yes if he is. Over the summer I let him run in our yard naked sometimes [especially on days when we were playing in the pool anyway] and when he peed I would tell him that he peed. Now after these last couple of months he has made the connection between peeing, pooping, and his diaper versus the potty.
Now I make it a point to ask him at some point each day "do you need to go potty?" "do you want to try sitting on your potty?" Sometimes he just says No but sometimes he says "potty", and I take him right in there. Of course, most of the time he gets right back up but I try to keep him interested by encouraging him to go pee.. "make it wet" or I'll say "you can go poopy in the potty". Sometimes I let him choose a board book to bring in there and read while he sits on the potty. I don't push him any more than that. Forcing him would only make him want to rebel. Lately, he has been going on purpose. He actually squeezes as hard as he can until there's nothing left. He likes to watch himself pee, which helps,...but also he loves getting praised afterward and he claps for himself and has a big beaming smile. Just a couple of days ago, he asked to go for the first time. He kept yelling "Potty? Potty? Potty?". It's awesome. My son loves dogs [he calls all dogs "puppy" still] and loves stickers...so I got him some shiny puppy stickers from the dollar store and have been giving them to him when he does something really good [like wiping up spilled milk from the floor without me even asking him]. I've been giving them to him when he really tries to go potty, too, and that also encourages him. Anyway, I still don't plan to push him. You really have to let the child lead the way especially at this age--a lot of boys don't even start showing interest until age 3 or older. In fact, I don't expect my son to be trained until at least 3. But, you can make it fun and rewarding and use gentle suggestion in the meantime. If he gets the idea and wants to go, great! If not, don't get upset- just keep trying. Never force him, and try as hard as you can to hide your frustration if he refuses to go or if he pees on the floor or something. Just one negative experience could cause a huge setback. Anyway, I am not an expert...my son is not trained yet, but I wanted to share what has been working for us so far.