You're right, the best way to make an example of how an asexual feels is probably to tell someone straight that it would be like imagining sex with someone of the same gender. I don't find it appealing, but in an asexual's case it applies to both genders.
I'm wondering if being asexual means that you have a different aspect on OTHER things though. Like just overall human relationships, or interests.
As for the whole taking pride thing, I'm not sure exactly where it stems from. My ex said she found all sexual interactions gross, and she's glad she's not interested in them (she didn't want children either :<) I personally think its a pleasurable experience and preference probably goes only one way most of the time. I enjoyed my asexuality. I can't really say this is true since I'm only speaking from my opinion, but I think asexual people would prefer not to be asexual (looking back on my life before puberty), but once you have a taste of sexuality you'd never go back.
But thats just me. Feel free to dispute or back me up however you'd like.