I agree with Fearingsept and have been doing the same as him. I have a directory setup to drop torrent files into it and they automatically start
I used this feature when at home, but SWMBO found it a bit too complicated and started leaving the torrent downloading to me. That was until I got the transmission remote apps setup as follows:
We queue up torrents via the tablet or our mobile phones via its 3G connection, where we don't have access to the house network shares. With Transmission, the way we have the devices configured, all we need to do is select the magnet link in a browser, and the torrent is queued. No mucking around with downloading or moving .torrent files around. We can manage (pause, delete, resume, prioritize, etc) the whole daemon from wherever.
Also, from what I've read, .torrent files are likely to be phased out and replaced with magnet links by most major trackers for legal reasons.
Just my $0.02.