My priorities and likes and dislikes would probably be a lot different than yours. For example, here in CT at this point in my life I would never even consider a townhouse or condo, as they are overpriced and I can purchase a small house for about the same and not have to worry about rules and management fees. However, I did live in a town house in FL in my early 20's, which was a great option for me at that time in my life.
First of all, make a list of what you like about your town house. Then make a list of the things you don't like.
Corner Lot - what do you get? Extra yard, that you need to maintain? Extra windows on the side of the unit rather than just front and back? Are the features worth the extra cost, keeping in mind property taxes. To me, probably a non-issue.
Sq. footage - it's really not about sq. ft. as much as layout. Does it work for your lifestyle?
Guest parking - how often do you have guests? How many at a time? Many complexes have a guest parking lot, but it may be a long walk to your unit, some just have on street parking.
If you find some place you like, visit it at different times of the day and on a weekend. You may find it quiet on a Wednesday evening when you view it, but on a Saturday afternoon it may be a completely different situation.
How old are your kids? What's important to you and them? Do you want them to have a space to play directly outside the kitchen window? Are they old enough to walk down the street to the playground without you? Check out the playground, is it full of moms and small kids, or a hang out for older kids?
For me having the middle and high school within walking distance is a must. I can't tell you how convenient it is when they have afterschool activites, or I need to do a pick up at 9:00 pm.