I've never flown a 170 although I've ogled and fondled quite a few. If I'm flying for recreation/fun/adventure I'd probably rather have the 170 especially if it's a super 170 with an O-360. If I'm flying for somewhat practical transportation between airports the 182 usually carries more weight, farther, faster. I actually wanted a 170 when I was shopping for airplanes but 180 HP 170's were considerably more expensive than 182's that were 10-20 years newer ($80k 170s vs $60k 182s). Personally I find 182's kind of boring and wish I had a 170, but alas I own a C182B. Part of the problem is that C170B are few in number and getting ancient. Purchasing the O-360 STC for them is also getting to be cost prohibitive, so you have to find one that's already had it done if you want the 180 HP motor.