I had some problems with my last Seagate (bought around 2006) Right out of the box, it made "odd" noises. Ended up going with a WD and it's been humming along just fine. Oh, and speaking with a computer shop owner (essentially begging for a job) we got into hard drives. He said they used to use Seagates because of the 5 year warranty and such. However, their quality has gone downhill recently, and they even dropped to 3 and 1 year warranties on some drives!
As for your drive, I'd confirm you have SMART enabled in your BIOS, if supported. You may also wish to look for Seagate's hard drive diagnostic software (usually a downloadable ISO). This won't guarantee you will find errors, even if the drive's acting up, but if it happens to find anything, you could take action if it's still under warranty or simply backing up your info (which probably wouldn't be a bad idea regardless...)