No. If from strangers, I generally get suspicious...but I attribute that more to my misanthropic nature than my ENTP-ness.
If from a friend, it's something that I would expect a friend to do, just as I do for friends. If from a stranger, and the situation seems weird in the context of the kindness, I get suspicious.
For example, I have on more than one occasion, hopped out of my truck to help someone push their out-of-gas car out of an intersection or into a parking lot. They are amazed, I say no problem and am on my way. In addition to having it SUCK to try and move a vehicle during an July afternoon in Arizona, it's just cool.
But if I just walked up to someone and was "being kind", or whatever, I would rightly expect them to be suspicious.
If someone does me a kindness, like covers a $1 or so I am short on some coffee drink, I am thankful, and try to "pay it forward" (I hate that phrase, but none other really fits). But it's not like they become my best friend. Nor would I expect them to become mine were the situation reversed.