I help pay my rent and bills through my artwork, so I don't really have time to make any artwork that won't bring in a profit that isn't either personal or for my girlfriend. Personally, I think it's kind of rude to request something from an artist, at least if you don't know them personally. In my mind, requesting something is the same as saying "hey you don't know me and I can't really give you a good reason to do this, but would you give me free art?" Art is a skill and a trade. Asking for free art is like asking for free shoes at Walmart, or a free scarf at some street vendor. Some people are cool with it, I understand this, but to me asking something like that is a little too forward and kinda inconsiderate. Plus if all I do is requests and/or trades, eventually no one will commission me because they'll realize I'll do free art for them if they wait long enough or harass me to do it. So I always say no to requests and I'm really picky about trades.
I really like it!