Ah! I love some of these shows!
Serenity, Aeryn, Carter & Magnus are all GP of mine for the same reasons.
River (Firefly & Doctor Who)
Leeloo (Fifth Element)
Vala (Stargate) - This wavers between being a GP and an outright usable name in my mind.
Kaylee (Firefly) - I actually really like her full name too. Kaywinnet is so strange that it's adorable.
Azkadellia (Tin Man)
Trillian (Hitchhiker's Guide To The Galaxy)
Ace (Doctor Who)
Stark (Farscape & Eureka)
Scorpius (Farscape) - I loved the name from Farscape and then when it showed up in Harry Potter, it become a GP of mine. Completely ridiculous and unusable but a guilty pleasure nonetheless.
Jayne (Firefly) - it's a boys name in my mind now. Between Firefly and the Mentalist, Jayne/Jane no longer sounds very feminine to me.
Ambrose (Tin Man)
Ianto (Torchwood) - perfectly usable name but probably not where I live.
In addition some names from these shows are actual favourites, e.g. Claudia, Arthur & Helena from Warehouse 13, Henry from Eureka & Sanctuary, and Zane from Eureka, to name a few.