You like what you like. Personally... I'm not fond of either Code Geas or Death Note, myself, and I've seen...a lot more than that list, myself. I just can't stand the lead character of either. At all. But personal preferences are just that... does that make them terrible anime? No. Just means they aren't something I personally enjoy. Considering your list... I'm not sure you're likely to be the sort to watch Cardcaptor Sakura or various other Shoujou anime. Does that mean Shoujou is bad? No. It means you'd rather Shounen. I would suggest trying some of it out sometime, since...well, you'll never know if you don't try a bit, too.
As for those suggesting Hellsing? Listen to them, it's awesome.
As for those suggesting Hellsing? Listen to them, it's awesome.