Explain to me in how one recent season, 28,000 went to see us play Blackburn, then 40,000 went to see us play Arsenal? Of course not all 40,000 go to see the opposition, as a lot of them fans will be season ticket holders, who don't buy a season ticket just for the Arsenal, but a fair few thousand will pick & choose games depending on the opposition.
Your poll's shit, btw. You don't need to ask people why & when they go to games, you need to ask if people believe that some fans go to see the opposition as much as Villa.