The glenlivet aged 12 years is a fantastic scotch. There are some better single malt scotches out there for close to the same price. I will list a few, but I'm not recommending them today because they are hit and miss and I do not want you to buy something for your birthday that you end up not liking.
What I'd recommend to try at some point: laphroaig 10 years, highland park 12 years and macallen 12 years. While I like highland park the best out of those three it is the most hit and miss scotch I've mentioned. I've never heard someone say "its okay" its either a fantastic scotch or its shit.
TL;DR I recommend the glenlivet 12 years