as a washers and dryers designer, knowing all the backstages about the dryer's "miracle" I have a very strong opinion.
USE THE DRYER ONLY AS LAST OPTION!
Drier facts (all manufacturers knows that):
1) your clothes will last longer if you use a line instead of a dryer.
2) dryers spend a lot of money in energy (no matter if it's gas or electricity.)
3) Dryers remove the softener smell because of the constant air flow.
4) If you have a high G-factor washer, or a spin dryer, you can air dry even jeans and towels.
5) The money you save in two years if you prefer to use a line is enough for a 30 days vacation trip to London, including air tickets, 5 star hotel, meals and some tours and souvenirs. (brazilian fact because our energy is too expensive. I don't know in other countries because energy prices are different).
6) dryers are an excellent option to save energy IF YOU KNOW HOW TO USE IT!! Try to hang the clothes right after finished the washer's cyce. whe it's almost dry, you can use the dryer LOWEST TEMPERATURE, NO MATTER WHAT KIND OF FABRIC, ony to remove wrinkles. It saves hours of ironing.
7) If you can choose, prefer ELECTRIC dryers. They are safer and "less harmful" to our environment.
8) FORGET the dryer's drying rack. if the garment is so delicate that can't be tumbed, it's delicate enough to never see the dryer's interior.
9) try to do your laundry in sunny days. if it's impossible, try to use a fan near the rack to speed the drying. if it still not enough, so then use the dryer. BUT AT LEAST TRY!
10) If the moisture sensor turns the dryer off before the clothe are dry (and load is ok, program is correct), don't run other cycle or those "a few minutes more" timed cyce. residual moisture is not enough to make the clothes smell like my grandmother. finish to dry in the line. depending on the weather, it can be much faster than the dryer.
11) Ok, we have money to buy a dryer, we have money to pay for the energy and hang the clothes one by one is really boring BUT take the clothes out of the washer and toss them in the dryer is NOT only a fancy. it's stupidity. (except in those regions with a terrible weather.)
12) if you have a rack, on the summer you can use the air conditioner to dry the clothes. Just place the rack in room with the A/C on. of coure you won't turn um the A/C ony to dry the clothes.
it helps to balance the moisture level and it will kill two lions with a single shot.