I can't resist to defend TW~
As far as I'm concerned, TW is not a science-fiction drama, but rather a soap and a successful one. I like it not because of all the alien stuff. The dynamics between the team member is what truly attracts me.
They wear their suit is because the suits define who they are. Captain Jack's wardrobe is his symbol and Ianto's suit fit his character as him being a very serious man. Owen is a playboy and you can see those childish decorations on his lab coat. Tosh and Gwen are mature woman, and as an adult show, you can see their big boobs every time (not that I like it)
Some episodes are really boring, but some others are fantastic. Personally, my favorite episodes are Everything changes, Captain Jack Harkness, Kiss kiss bang bang, something borrowed and Fragments.
TW is just a young show while DW is such a long running successful show. But TW is more successful than DW in the US. That prove something. Not to mention, gay people love TW. Frankly, tw is the most complicated TW drama I've ever watched in terms of sexual relationship.