I play this inquisitor (human rogue) as mid/late thirties. It might change on other playthroughs, depending on race, and the background I've created for them. I liked that most of the companions are older to match. Since I'm early 40's myself, I think I lean towards making my characters older. Even for DAO, I imagine my wardens a bit older than what the general consensus seems to be. I even bump Alistair up to his 20's, and just say he was very sheltered
Sigh. Alistair. I'll always be a little in love with him, like you are with a first love. Then came Anders! I fell in love with Anders in Awakenings, even wrote mountains of fanfic for him. Then it all turned into AU when DA2 happened! *shakes fist at justice* I still couldn't keep away from him in DA2, most of my Hawke's romanced him.
I've only done the Blackwall romance so far, and I have a feeling it's going to be really hard to keep away him in my next playthroughs. He's just got it all. Dark and brooding, but not too brooding; wanting to do the right thing and believing in a higher purpose, but not naive; a dark past, but a hopeful future (in this playthrough, at least!); a man trying to be a better person for all the horrible mistakes he made. I do love a good redemption story! (Angel from Buffy, Hook from OUAT, the list goes on.) Plus, I'm just a sucker for that brawny, lumberjack dark-haired type.
I really do want to try out Cullen's story, because it seems so rich (especially on a mage character... my Amell flirted with him in DAO). And I have to do Dorian's romance, because one, my girl is totally BFF with him right now and they love flirting just to flirt, and two, he reminds me a little of Awakening Anders, before DA2 went down.