I usually went to about 25-30 per season (bought a package of games from a season seat holder through one of my dads friends who had tickets 2 rows behind the away team dugout), though have taken it down a couple of notches the past 2-3 years. After watching games in other ballparks, I'm not that crazy as I once was to go down to the Rogers Centre unless theres a particular team/pitcher/player I want to see. Still went to about 15 games last year, and saw the Jays play in Anaheim when I was in California last August.
I've only been to 3 games this season (which is quite low for me at this point in the season) though I was away in Europe for 6 weeks at the start of June. Plus, like GD said ticket prices have become more expensive. Cheapest seats in the 500s now are $25 face value through the box office. I'll probably catch another 3-5 games before seasons end, though I'd rather save the money for postseason tickets if the Jays make it again. I went to every postseason game last season which was awesome! I'm thinking about taking a trip out to the west coast in September to see the Jays play the Mariners in Seattle.