Also, for people that are interested in a tablet just for gaming the larger the screen the better, especially if you like RPGs.
I would also absolutely recommend iOS over Android if you are interested in games, though that situation looks like it
may be changing in the future.
There are some great games out there like Avadon I and II; Avernum; Baldur's Gate I and II; Final Fantasy III, IV, and XI; FTL; Super Hexagon; Elder Sign Omens; Ridiculous Fishing; God of Blades; and XCOM Enemy Unknown.
Browse through the "Reviews" sections of pocket tactics (specifically the 2013/2014 review indexes) to build a list of games to check out...this is probably the only mobile-oriented gaming site that I really trust:
http://www.pockettactics.com/
Also, wherever possible look for ways to save yourself some money... do yourself and favor and save some money by avoiding the "Free" sections of these app stores.
That means try your fucking hardest to avoid free to play games like the fucking plague.
"Free" games are designed to ramp up the roadblocks to enjoyment until you are 'forced' to pay more money to continue. And unlike pay games, where you pay some money up front and play the game until completion, free to play games will keep taking more and more and more and more of your money. They are actively designed to start off fun and then suck the fucking life out of you until you pay them some money so the game can maybe be fun again. And then you get trapped because you invested money in the game and want to continue progress repeating the fucking cycle.
Filter your experiences up front. Find a reviewer or site you trust and have them filter out the good from the fucking utter shite. Pay up front for your experiences only after someone has already done the "if this game worth it" legwork for you. And even if that trusted reviewer or site says that a "free" game is worth it...it isn't.
The ONLY exception to this are free games with one time in-app purchases (more common on Android than iOS) or the rare example of a free game without any in app purchases.